VisualC/external/lib/x86/LICENSE.mpg123.txt
author Sam Lantinga <slouken@libsdl.org>
Fri, 26 Oct 2018 14:45:32 -0700
changeset 919 38d3f36bd7dd
parent 790 23626ec410c8
permissions -rw-r--r--
Added the location of the external library source code
     1 The source code to this library used with SDL_mixer can be found here:
     2 https://hg.libsdl.org/SDL_mixer/file/default/external
     3 ---
     4 
     5 This is the file that contains the terms of use, copying, etc. for the mpg123 distribution package.
     6 
     7 Main message, to include in "About ..." boxes, etc:
     8 
     9 	Copyright (c) 1995-2013 by Michael Hipp and others,
    10 	free software under the terms of the LGPL v2.1
    11 
    12 There is an attempt to cover the actual list of authors in the AUTHORS file.
    13 Project maintainer since 2006 is Thomas Orgis and many people have contributed
    14 since the Michael Hipp era, but he stays the initial source and it would
    15 be impractical to count them all individually, so it's "and others".
    16 Source files contain the phrase "the mpg123 project" to the same effect
    17 in their license boilerplate; especially those that were added after
    18 maintainership changed. The person mainly responsible for the first version
    19 is usually named in the phrase "initially written by ...".
    20 
    21 All files in the distribution that don't carry a license note on their own are
    22 licensed under the terms of the LGPL 2.1; exceptions may apply, especially to
    23 files not in the official distribution but in the revision control repository.
    24 
    25 The formal license text follows.
    26 
    27 =======================
    28 1. The LGPL version 2.1
    29 =======================
    30 
    31 
    32   GNU LESSER GENERAL PUBLIC LICENSE
    33        Version 2.1, February 1999
    34 
    35  Copyright (C) 1991, 1999 Free Software Foundation, Inc.
    36  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
    37  Everyone is permitted to copy and distribute verbatim copies
    38  of this license document, but changing it is not allowed.
    39 
    40 [This is the first released version of the Lesser GPL.  It also counts
    41  as the successor of the GNU Library Public License, version 2, hence
    42  the version number 2.1.]
    43 
    44     Preamble
    45 
    46   The licenses for most software are designed to take away your
    47 freedom to share and change it.  By contrast, the GNU General Public
    48 Licenses are intended to guarantee your freedom to share and change
    49 free software--to make sure the software is free for all its users.
    50 
    51   This license, the Lesser General Public License, applies to some
    52 specially designated software packages--typically libraries--of the
    53 Free Software Foundation and other authors who decide to use it.  You
    54 can use it too, but we suggest you first think carefully about whether
    55 this license or the ordinary General Public License is the better
    56 strategy to use in any particular case, based on the explanations below.
    57 
    58   When we speak of free software, we are referring to freedom of use,
    59 not price.  Our General Public Licenses are designed to make sure that
    60 you have the freedom to distribute copies of free software (and charge
    61 for this service if you wish); that you receive source code or can get
    62 it if you want it; that you can change the software and use pieces of
    63 it in new free programs; and that you are informed that you can do
    64 these things.
    65 
    66   To protect your rights, we need to make restrictions that forbid
    67 distributors to deny you these rights or to ask you to surrender these
    68 rights.  These restrictions translate to certain responsibilities for
    69 you if you distribute copies of the library or if you modify it.
    70 
    71   For example, if you distribute copies of the library, whether gratis
    72 or for a fee, you must give the recipients all the rights that we gave
    73 you.  You must make sure that they, too, receive or can get the source
    74 code.  If you link other code with the library, you must provide
    75 complete object files to the recipients, so that they can relink them
    76 with the library after making changes to the library and recompiling
    77 it.  And you must show them these terms so they know their rights.
    78 
    79   We protect your rights with a two-step method: (1) we copyright the
    80 library, and (2) we offer you this license, which gives you legal
    81 permission to copy, distribute and/or modify the library.
    82 
    83   To protect each distributor, we want to make it very clear that
    84 there is no warranty for the free library.  Also, if the library is
    85 modified by someone else and passed on, the recipients should know
    86 that what they have is not the original version, so that the original
    87 author's reputation will not be affected by problems that might be
    88 introduced by others.
    89 
    90   Finally, software patents pose a constant threat to the existence of
    91 any free program.  We wish to make sure that a company cannot
    92 effectively restrict the users of a free program by obtaining a
    93 restrictive license from a patent holder.  Therefore, we insist that
    94 any patent license obtained for a version of the library must be
    95 consistent with the full freedom of use specified in this license.
    96 
    97   Most GNU software, including some libraries, is covered by the
    98 ordinary GNU General Public License.  This license, the GNU Lesser
    99 General Public License, applies to certain designated libraries, and
   100 is quite different from the ordinary General Public License.  We use
   101 this license for certain libraries in order to permit linking those
   102 libraries into non-free programs.
   103 
   104   When a program is linked with a library, whether statically or using
   105 a shared library, the combination of the two is legally speaking a
   106 combined work, a derivative of the original library.  The ordinary
   107 General Public License therefore permits such linking only if the
   108 entire combination fits its criteria of freedom.  The Lesser General
   109 Public License permits more lax criteria for linking other code with
   110 the library.
   111 
   112   We call this license the "Lesser" General Public License because it
   113 does Less to protect the user's freedom than the ordinary General
   114 Public License.  It also provides other free software developers Less
   115 of an advantage over competing non-free programs.  These disadvantages
   116 are the reason we use the ordinary General Public License for many
   117 libraries.  However, the Lesser license provides advantages in certain
   118 special circumstances.
   119 
   120   For example, on rare occasions, there may be a special need to
   121 encourage the widest possible use of a certain library, so that it becomes
   122 a de-facto standard.  To achieve this, non-free programs must be
   123 allowed to use the library.  A more frequent case is that a free
   124 library does the same job as widely used non-free libraries.  In this
   125 case, there is little to gain by limiting the free library to free
   126 software only, so we use the Lesser General Public License.
   127 
   128   In other cases, permission to use a particular library in non-free
   129 programs enables a greater number of people to use a large body of
   130 free software.  For example, permission to use the GNU C Library in
   131 non-free programs enables many more people to use the whole GNU
   132 operating system, as well as its variant, the GNU/Linux operating
   133 system.
   134 
   135   Although the Lesser General Public License is Less protective of the
   136 users' freedom, it does ensure that the user of a program that is
   137 linked with the Library has the freedom and the wherewithal to run
   138 that program using a modified version of the Library.
   139 
   140   The precise terms and conditions for copying, distribution and
   141 modification follow.  Pay close attention to the difference between a
   142 "work based on the library" and a "work that uses the library".  The
   143 former contains code derived from the library, whereas the latter must
   144 be combined with the library in order to run.
   145 
   146   GNU LESSER GENERAL PUBLIC LICENSE
   147    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
   148 
   149   0. This License Agreement applies to any software library or other
   150 program which contains a notice placed by the copyright holder or
   151 other authorized party saying it may be distributed under the terms of
   152 this Lesser General Public License (also called "this License").
   153 Each licensee is addressed as "you".
   154 
   155   A "library" means a collection of software functions and/or data
   156 prepared so as to be conveniently linked with application programs
   157 (which use some of those functions and data) to form executables.
   158 
   159   The "Library", below, refers to any such software library or work
   160 which has been distributed under these terms.  A "work based on the
   161 Library" means either the Library or any derivative work under
   162 copyright law: that is to say, a work containing the Library or a
   163 portion of it, either verbatim or with modifications and/or translated
   164 straightforwardly into another language.  (Hereinafter, translation is
   165 included without limitation in the term "modification".)
   166 
   167   "Source code" for a work means the preferred form of the work for
   168 making modifications to it.  For a library, complete source code means
   169 all the source code for all modules it contains, plus any associated
   170 interface definition files, plus the scripts used to control compilation
   171 and installation of the library.
   172 
   173   Activities other than copying, distribution and modification are not
   174 covered by this License; they are outside its scope.  The act of
   175 running a program using the Library is not restricted, and output from
   176 such a program is covered only if its contents constitute a work based
   177 on the Library (independent of the use of the Library in a tool for
   178 writing it).  Whether that is true depends on what the Library does
   179 and what the program that uses the Library does.
   180   
   181   1. You may copy and distribute verbatim copies of the Library's
   182 complete source code as you receive it, in any medium, provided that
   183 you conspicuously and appropriately publish on each copy an
   184 appropriate copyright notice and disclaimer of warranty; keep intact
   185 all the notices that refer to this License and to the absence of any
   186 warranty; and distribute a copy of this License along with the
   187 Library.
   188 
   189   You may charge a fee for the physical act of transferring a copy,
   190 and you may at your option offer warranty protection in exchange for a
   191 fee.
   192 
   193   2. You may modify your copy or copies of the Library or any portion
   194 of it, thus forming a work based on the Library, and copy and
   195 distribute such modifications or work under the terms of Section 1
   196 above, provided that you also meet all of these conditions:
   197 
   198     a) The modified work must itself be a software library.
   199 
   200     b) You must cause the files modified to carry prominent notices
   201     stating that you changed the files and the date of any change.
   202 
   203     c) You must cause the whole of the work to be licensed at no
   204     charge to all third parties under the terms of this License.
   205 
   206     d) If a facility in the modified Library refers to a function or a
   207     table of data to be supplied by an application program that uses
   208     the facility, other than as an argument passed when the facility
   209     is invoked, then you must make a good faith effort to ensure that,
   210     in the event an application does not supply such function or
   211     table, the facility still operates, and performs whatever part of
   212     its purpose remains meaningful.
   213 
   214     (For example, a function in a library to compute square roots has
   215     a purpose that is entirely well-defined independent of the
   216     application.  Therefore, Subsection 2d requires that any
   217     application-supplied function or table used by this function must
   218     be optional: if the application does not supply it, the square
   219     root function must still compute square roots.)
   220 
   221 These requirements apply to the modified work as a whole.  If
   222 identifiable sections of that work are not derived from the Library,
   223 and can be reasonably considered independent and separate works in
   224 themselves, then this License, and its terms, do not apply to those
   225 sections when you distribute them as separate works.  But when you
   226 distribute the same sections as part of a whole which is a work based
   227 on the Library, the distribution of the whole must be on the terms of
   228 this License, whose permissions for other licensees extend to the
   229 entire whole, and thus to each and every part regardless of who wrote
   230 it.
   231 
   232 Thus, it is not the intent of this section to claim rights or contest
   233 your rights to work written entirely by you; rather, the intent is to
   234 exercise the right to control the distribution of derivative or
   235 collective works based on the Library.
   236 
   237 In addition, mere aggregation of another work not based on the Library
   238 with the Library (or with a work based on the Library) on a volume of
   239 a storage or distribution medium does not bring the other work under
   240 the scope of this License.
   241 
   242   3. You may opt to apply the terms of the ordinary GNU General Public
   243 License instead of this License to a given copy of the Library.  To do
   244 this, you must alter all the notices that refer to this License, so
   245 that they refer to the ordinary GNU General Public License, version 2,
   246 instead of to this License.  (If a newer version than version 2 of the
   247 ordinary GNU General Public License has appeared, then you can specify
   248 that version instead if you wish.)  Do not make any other change in
   249 these notices.
   250 
   251   Once this change is made in a given copy, it is irreversible for
   252 that copy, so the ordinary GNU General Public License applies to all
   253 subsequent copies and derivative works made from that copy.
   254 
   255   This option is useful when you wish to copy part of the code of
   256 the Library into a program that is not a library.
   257 
   258   4. You may copy and distribute the Library (or a portion or
   259 derivative of it, under Section 2) in object code or executable form
   260 under the terms of Sections 1 and 2 above provided that you accompany
   261 it with the complete corresponding machine-readable source code, which
   262 must be distributed under the terms of Sections 1 and 2 above on a
   263 medium customarily used for software interchange.
   264 
   265   If distribution of object code is made by offering access to copy
   266 from a designated place, then offering equivalent access to copy the
   267 source code from the same place satisfies the requirement to
   268 distribute the source code, even though third parties are not
   269 compelled to copy the source along with the object code.
   270 
   271   5. A program that contains no derivative of any portion of the
   272 Library, but is designed to work with the Library by being compiled or
   273 linked with it, is called a "work that uses the Library".  Such a
   274 work, in isolation, is not a derivative work of the Library, and
   275 therefore falls outside the scope of this License.
   276 
   277   However, linking a "work that uses the Library" with the Library
   278 creates an executable that is a derivative of the Library (because it
   279 contains portions of the Library), rather than a "work that uses the
   280 library".  The executable is therefore covered by this License.
   281 Section 6 states terms for distribution of such executables.
   282 
   283   When a "work that uses the Library" uses material from a header file
   284 that is part of the Library, the object code for the work may be a
   285 derivative work of the Library even though the source code is not.
   286 Whether this is true is especially significant if the work can be
   287 linked without the Library, or if the work is itself a library.  The
   288 threshold for this to be true is not precisely defined by law.
   289 
   290   If such an object file uses only numerical parameters, data
   291 structure layouts and accessors, and small macros and small inline
   292 functions (ten lines or less in length), then the use of the object
   293 file is unrestricted, regardless of whether it is legally a derivative
   294 work.  (Executables containing this object code plus portions of the
   295 Library will still fall under Section 6.)
   296 
   297   Otherwise, if the work is a derivative of the Library, you may
   298 distribute the object code for the work under the terms of Section 6.
   299 Any executables containing that work also fall under Section 6,
   300 whether or not they are linked directly with the Library itself.
   301 
   302   6. As an exception to the Sections above, you may also combine or
   303 link a "work that uses the Library" with the Library to produce a
   304 work containing portions of the Library, and distribute that work
   305 under terms of your choice, provided that the terms permit
   306 modification of the work for the customer's own use and reverse
   307 engineering for debugging such modifications.
   308 
   309   You must give prominent notice with each copy of the work that the
   310 Library is used in it and that the Library and its use are covered by
   311 this License.  You must supply a copy of this License.  If the work
   312 during execution displays copyright notices, you must include the
   313 copyright notice for the Library among them, as well as a reference
   314 directing the user to the copy of this License.  Also, you must do one
   315 of these things:
   316 
   317     a) Accompany the work with the complete corresponding
   318     machine-readable source code for the Library including whatever
   319     changes were used in the work (which must be distributed under
   320     Sections 1 and 2 above); and, if the work is an executable linked
   321     with the Library, with the complete machine-readable "work that
   322     uses the Library", as object code and/or source code, so that the
   323     user can modify the Library and then relink to produce a modified
   324     executable containing the modified Library.  (It is understood
   325     that the user who changes the contents of definitions files in the
   326     Library will not necessarily be able to recompile the application
   327     to use the modified definitions.)
   328 
   329     b) Use a suitable shared library mechanism for linking with the
   330     Library.  A suitable mechanism is one that (1) uses at run time a
   331     copy of the library already present on the user's computer system,
   332     rather than copying library functions into the executable, and (2)
   333     will operate properly with a modified version of the library, if
   334     the user installs one, as long as the modified version is
   335     interface-compatible with the version that the work was made with.
   336 
   337     c) Accompany the work with a written offer, valid for at
   338     least three years, to give the same user the materials
   339     specified in Subsection 6a, above, for a charge no more
   340     than the cost of performing this distribution.
   341 
   342     d) If distribution of the work is made by offering access to copy
   343     from a designated place, offer equivalent access to copy the above
   344     specified materials from the same place.
   345 
   346     e) Verify that the user has already received a copy of these
   347     materials or that you have already sent this user a copy.
   348 
   349   For an executable, the required form of the "work that uses the
   350 Library" must include any data and utility programs needed for
   351 reproducing the executable from it.  However, as a special exception,
   352 the materials to be distributed need not include anything that is
   353 normally distributed (in either source or binary form) with the major
   354 components (compiler, kernel, and so on) of the operating system on
   355 which the executable runs, unless that component itself accompanies
   356 the executable.
   357 
   358   It may happen that this requirement contradicts the license
   359 restrictions of other proprietary libraries that do not normally
   360 accompany the operating system.  Such a contradiction means you cannot
   361 use both them and the Library together in an executable that you
   362 distribute.
   363 
   364   7. You may place library facilities that are a work based on the
   365 Library side-by-side in a single library together with other library
   366 facilities not covered by this License, and distribute such a combined
   367 library, provided that the separate distribution of the work based on
   368 the Library and of the other library facilities is otherwise
   369 permitted, and provided that you do these two things:
   370 
   371     a) Accompany the combined library with a copy of the same work
   372     based on the Library, uncombined with any other library
   373     facilities.  This must be distributed under the terms of the
   374     Sections above.
   375 
   376     b) Give prominent notice with the combined library of the fact
   377     that part of it is a work based on the Library, and explaining
   378     where to find the accompanying uncombined form of the same work.
   379 
   380   8. You may not copy, modify, sublicense, link with, or distribute
   381 the Library except as expressly provided under this License.  Any
   382 attempt otherwise to copy, modify, sublicense, link with, or
   383 distribute the Library is void, and will automatically terminate your
   384 rights under this License.  However, parties who have received copies,
   385 or rights, from you under this License will not have their licenses
   386 terminated so long as such parties remain in full compliance.
   387 
   388   9. You are not required to accept this License, since you have not
   389 signed it.  However, nothing else grants you permission to modify or
   390 distribute the Library or its derivative works.  These actions are
   391 prohibited by law if you do not accept this License.  Therefore, by
   392 modifying or distributing the Library (or any work based on the
   393 Library), you indicate your acceptance of this License to do so, and
   394 all its terms and conditions for copying, distributing or modifying
   395 the Library or works based on it.
   396 
   397   10. Each time you redistribute the Library (or any work based on the
   398 Library), the recipient automatically receives a license from the
   399 original licensor to copy, distribute, link with or modify the Library
   400 subject to these terms and conditions.  You may not impose any further
   401 restrictions on the recipients' exercise of the rights granted herein.
   402 You are not responsible for enforcing compliance by third parties with
   403 this License.
   404 
   405   11. If, as a consequence of a court judgment or allegation of patent
   406 infringement or for any other reason (not limited to patent issues),
   407 conditions are imposed on you (whether by court order, agreement or
   408 otherwise) that contradict the conditions of this License, they do not
   409 excuse you from the conditions of this License.  If you cannot
   410 distribute so as to satisfy simultaneously your obligations under this
   411 License and any other pertinent obligations, then as a consequence you
   412 may not distribute the Library at all.  For example, if a patent
   413 license would not permit royalty-free redistribution of the Library by
   414 all those who receive copies directly or indirectly through you, then
   415 the only way you could satisfy both it and this License would be to
   416 refrain entirely from distribution of the Library.
   417 
   418 If any portion of this section is held invalid or unenforceable under any
   419 particular circumstance, the balance of the section is intended to apply,
   420 and the section as a whole is intended to apply in other circumstances.
   421 
   422 It is not the purpose of this section to induce you to infringe any
   423 patents or other property right claims or to contest validity of any
   424 such claims; this section has the sole purpose of protecting the
   425 integrity of the free software distribution system which is
   426 implemented by public license practices.  Many people have made
   427 generous contributions to the wide range of software distributed
   428 through that system in reliance on consistent application of that
   429 system; it is up to the author/donor to decide if he or she is willing
   430 to distribute software through any other system and a licensee cannot
   431 impose that choice.
   432 
   433 This section is intended to make thoroughly clear what is believed to
   434 be a consequence of the rest of this License.
   435 
   436   12. If the distribution and/or use of the Library is restricted in
   437 certain countries either by patents or by copyrighted interfaces, the
   438 original copyright holder who places the Library under this License may add
   439 an explicit geographical distribution limitation excluding those countries,
   440 so that distribution is permitted only in or among countries not thus
   441 excluded.  In such case, this License incorporates the limitation as if
   442 written in the body of this License.
   443 
   444   13. The Free Software Foundation may publish revised and/or new
   445 versions of the Lesser General Public License from time to time.
   446 Such new versions will be similar in spirit to the present version,
   447 but may differ in detail to address new problems or concerns.
   448 
   449 Each version is given a distinguishing version number.  If the Library
   450 specifies a version number of this License which applies to it and
   451 "any later version", you have the option of following the terms and
   452 conditions either of that version or of any later version published by
   453 the Free Software Foundation.  If the Library does not specify a
   454 license version number, you may choose any version ever published by
   455 the Free Software Foundation.
   456 
   457   14. If you wish to incorporate parts of the Library into other free
   458 programs whose distribution conditions are incompatible with these,
   459 write to the author to ask for permission.  For software which is
   460 copyrighted by the Free Software Foundation, write to the Free
   461 Software Foundation; we sometimes make exceptions for this.  Our
   462 decision will be guided by the two goals of preserving the free status
   463 of all derivatives of our free software and of promoting the sharing
   464 and reuse of software generally.
   465 
   466     NO WARRANTY
   467 
   468   15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
   469 WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
   470 EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
   471 OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
   472 KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
   473 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   474 PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
   475 LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
   476 THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
   477 
   478   16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
   479 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
   480 AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
   481 FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
   482 CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
   483 LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
   484 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
   485 FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
   486 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   487 DAMAGES.
   488 
   489      END OF TERMS AND CONDITIONS
   490 
   491 
   492 ====================
   493 2. The GPL version 2
   494 ====================
   495 
   496 
   497    GNU GENERAL PUBLIC LICENSE
   498        Version 2, June 1991
   499 
   500  Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
   501  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   502  Everyone is permitted to copy and distribute verbatim copies
   503  of this license document, but changing it is not allowed.
   504 
   505     Preamble
   506 
   507   The licenses for most software are designed to take away your
   508 freedom to share and change it.  By contrast, the GNU General Public
   509 License is intended to guarantee your freedom to share and change free
   510 software--to make sure the software is free for all its users.  This
   511 General Public License applies to most of the Free Software
   512 Foundation's software and to any other program whose authors commit to
   513 using it.  (Some other Free Software Foundation software is covered by
   514 the GNU Lesser General Public License instead.)  You can apply it to
   515 your programs, too.
   516 
   517   When we speak of free software, we are referring to freedom, not
   518 price.  Our General Public Licenses are designed to make sure that you
   519 have the freedom to distribute copies of free software (and charge for
   520 this service if you wish), that you receive source code or can get it
   521 if you want it, that you can change the software or use pieces of it
   522 in new free programs; and that you know you can do these things.
   523 
   524   To protect your rights, we need to make restrictions that forbid
   525 anyone to deny you these rights or to ask you to surrender the rights.
   526 These restrictions translate to certain responsibilities for you if you
   527 distribute copies of the software, or if you modify it.
   528 
   529   For example, if you distribute copies of such a program, whether
   530 gratis or for a fee, you must give the recipients all the rights that
   531 you have.  You must make sure that they, too, receive or can get the
   532 source code.  And you must show them these terms so they know their
   533 rights.
   534 
   535   We protect your rights with two steps: (1) copyright the software, and
   536 (2) offer you this license which gives you legal permission to copy,
   537 distribute and/or modify the software.
   538 
   539   Also, for each author's protection and ours, we want to make certain
   540 that everyone understands that there is no warranty for this free
   541 software.  If the software is modified by someone else and passed on, we
   542 want its recipients to know that what they have is not the original, so
   543 that any problems introduced by others will not reflect on the original
   544 authors' reputations.
   545 
   546   Finally, any free program is threatened constantly by software
   547 patents.  We wish to avoid the danger that redistributors of a free
   548 program will individually obtain patent licenses, in effect making the
   549 program proprietary.  To prevent this, we have made it clear that any
   550 patent must be licensed for everyone's free use or not licensed at all.
   551 
   552   The precise terms and conditions for copying, distribution and
   553 modification follow.
   554 
   555     GNU GENERAL PUBLIC LICENSE
   556    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
   557 
   558   0. This License applies to any program or other work which contains
   559 a notice placed by the copyright holder saying it may be distributed
   560 under the terms of this General Public License.  The "Program", below,
   561 refers to any such program or work, and a "work based on the Program"
   562 means either the Program or any derivative work under copyright law:
   563 that is to say, a work containing the Program or a portion of it,
   564 either verbatim or with modifications and/or translated into another
   565 language.  (Hereinafter, translation is included without limitation in
   566 the term "modification".)  Each licensee is addressed as "you".
   567 
   568 Activities other than copying, distribution and modification are not
   569 covered by this License; they are outside its scope.  The act of
   570 running the Program is not restricted, and the output from the Program
   571 is covered only if its contents constitute a work based on the
   572 Program (independent of having been made by running the Program).
   573 Whether that is true depends on what the Program does.
   574 
   575   1. You may copy and distribute verbatim copies of the Program's
   576 source code as you receive it, in any medium, provided that you
   577 conspicuously and appropriately publish on each copy an appropriate
   578 copyright notice and disclaimer of warranty; keep intact all the
   579 notices that refer to this License and to the absence of any warranty;
   580 and give any other recipients of the Program a copy of this License
   581 along with the Program.
   582 
   583 You may charge a fee for the physical act of transferring a copy, and
   584 you may at your option offer warranty protection in exchange for a fee.
   585 
   586   2. You may modify your copy or copies of the Program or any portion
   587 of it, thus forming a work based on the Program, and copy and
   588 distribute such modifications or work under the terms of Section 1
   589 above, provided that you also meet all of these conditions:
   590 
   591     a) You must cause the modified files to carry prominent notices
   592     stating that you changed the files and the date of any change.
   593 
   594     b) You must cause any work that you distribute or publish, that in
   595     whole or in part contains or is derived from the Program or any
   596     part thereof, to be licensed as a whole at no charge to all third
   597     parties under the terms of this License.
   598 
   599     c) If the modified program normally reads commands interactively
   600     when run, you must cause it, when started running for such
   601     interactive use in the most ordinary way, to print or display an
   602     announcement including an appropriate copyright notice and a
   603     notice that there is no warranty (or else, saying that you provide
   604     a warranty) and that users may redistribute the program under
   605     these conditions, and telling the user how to view a copy of this
   606     License.  (Exception: if the Program itself is interactive but
   607     does not normally print such an announcement, your work based on
   608     the Program is not required to print an announcement.)
   609 
   610 These requirements apply to the modified work as a whole.  If
   611 identifiable sections of that work are not derived from the Program,
   612 and can be reasonably considered independent and separate works in
   613 themselves, then this License, and its terms, do not apply to those
   614 sections when you distribute them as separate works.  But when you
   615 distribute the same sections as part of a whole which is a work based
   616 on the Program, the distribution of the whole must be on the terms of
   617 this License, whose permissions for other licensees extend to the
   618 entire whole, and thus to each and every part regardless of who wrote it.
   619 
   620 Thus, it is not the intent of this section to claim rights or contest
   621 your rights to work written entirely by you; rather, the intent is to
   622 exercise the right to control the distribution of derivative or
   623 collective works based on the Program.
   624 
   625 In addition, mere aggregation of another work not based on the Program
   626 with the Program (or with a work based on the Program) on a volume of
   627 a storage or distribution medium does not bring the other work under
   628 the scope of this License.
   629 
   630   3. You may copy and distribute the Program (or a work based on it,
   631 under Section 2) in object code or executable form under the terms of
   632 Sections 1 and 2 above provided that you also do one of the following:
   633 
   634     a) Accompany it with the complete corresponding machine-readable
   635     source code, which must be distributed under the terms of Sections
   636     1 and 2 above on a medium customarily used for software interchange; or,
   637 
   638     b) Accompany it with a written offer, valid for at least three
   639     years, to give any third party, for a charge no more than your
   640     cost of physically performing source distribution, a complete
   641     machine-readable copy of the corresponding source code, to be
   642     distributed under the terms of Sections 1 and 2 above on a medium
   643     customarily used for software interchange; or,
   644 
   645     c) Accompany it with the information you received as to the offer
   646     to distribute corresponding source code.  (This alternative is
   647     allowed only for noncommercial distribution and only if you
   648     received the program in object code or executable form with such
   649     an offer, in accord with Subsection b above.)
   650 
   651 The source code for a work means the preferred form of the work for
   652 making modifications to it.  For an executable work, complete source
   653 code means all the source code for all modules it contains, plus any
   654 associated interface definition files, plus the scripts used to
   655 control compilation and installation of the executable.  However, as a
   656 special exception, the source code distributed need not include
   657 anything that is normally distributed (in either source or binary
   658 form) with the major components (compiler, kernel, and so on) of the
   659 operating system on which the executable runs, unless that component
   660 itself accompanies the executable.
   661 
   662 If distribution of executable or object code is made by offering
   663 access to copy from a designated place, then offering equivalent
   664 access to copy the source code from the same place counts as
   665 distribution of the source code, even though third parties are not
   666 compelled to copy the source along with the object code.
   667 
   668   4. You may not copy, modify, sublicense, or distribute the Program
   669 except as expressly provided under this License.  Any attempt
   670 otherwise to copy, modify, sublicense or distribute the Program is
   671 void, and will automatically terminate your rights under this License.
   672 However, parties who have received copies, or rights, from you under
   673 this License will not have their licenses terminated so long as such
   674 parties remain in full compliance.
   675 
   676   5. You are not required to accept this License, since you have not
   677 signed it.  However, nothing else grants you permission to modify or
   678 distribute the Program or its derivative works.  These actions are
   679 prohibited by law if you do not accept this License.  Therefore, by
   680 modifying or distributing the Program (or any work based on the
   681 Program), you indicate your acceptance of this License to do so, and
   682 all its terms and conditions for copying, distributing or modifying
   683 the Program or works based on it.
   684 
   685   6. Each time you redistribute the Program (or any work based on the
   686 Program), the recipient automatically receives a license from the
   687 original licensor to copy, distribute or modify the Program subject to
   688 these terms and conditions.  You may not impose any further
   689 restrictions on the recipients' exercise of the rights granted herein.
   690 You are not responsible for enforcing compliance by third parties to
   691 this License.
   692 
   693   7. If, as a consequence of a court judgment or allegation of patent
   694 infringement or for any other reason (not limited to patent issues),
   695 conditions are imposed on you (whether by court order, agreement or
   696 otherwise) that contradict the conditions of this License, they do not
   697 excuse you from the conditions of this License.  If you cannot
   698 distribute so as to satisfy simultaneously your obligations under this
   699 License and any other pertinent obligations, then as a consequence you
   700 may not distribute the Program at all.  For example, if a patent
   701 license would not permit royalty-free redistribution of the Program by
   702 all those who receive copies directly or indirectly through you, then
   703 the only way you could satisfy both it and this License would be to
   704 refrain entirely from distribution of the Program.
   705 
   706 If any portion of this section is held invalid or unenforceable under
   707 any particular circumstance, the balance of the section is intended to
   708 apply and the section as a whole is intended to apply in other
   709 circumstances.
   710 
   711 It is not the purpose of this section to induce you to infringe any
   712 patents or other property right claims or to contest validity of any
   713 such claims; this section has the sole purpose of protecting the
   714 integrity of the free software distribution system, which is
   715 implemented by public license practices.  Many people have made
   716 generous contributions to the wide range of software distributed
   717 through that system in reliance on consistent application of that
   718 system; it is up to the author/donor to decide if he or she is willing
   719 to distribute software through any other system and a licensee cannot
   720 impose that choice.
   721 
   722 This section is intended to make thoroughly clear what is believed to
   723 be a consequence of the rest of this License.
   724 
   725   8. If the distribution and/or use of the Program is restricted in
   726 certain countries either by patents or by copyrighted interfaces, the
   727 original copyright holder who places the Program under this License
   728 may add an explicit geographical distribution limitation excluding
   729 those countries, so that distribution is permitted only in or among
   730 countries not thus excluded.  In such case, this License incorporates
   731 the limitation as if written in the body of this License.
   732 
   733   9. The Free Software Foundation may publish revised and/or new versions
   734 of the General Public License from time to time.  Such new versions will
   735 be similar in spirit to the present version, but may differ in detail to
   736 address new problems or concerns.
   737 
   738 Each version is given a distinguishing version number.  If the Program
   739 specifies a version number of this License which applies to it and "any
   740 later version", you have the option of following the terms and conditions
   741 either of that version or of any later version published by the Free
   742 Software Foundation.  If the Program does not specify a version number of
   743 this License, you may choose any version ever published by the Free Software
   744 Foundation.
   745 
   746   10. If you wish to incorporate parts of the Program into other free
   747 programs whose distribution conditions are different, write to the author
   748 to ask for permission.  For software which is copyrighted by the Free
   749 Software Foundation, write to the Free Software Foundation; we sometimes
   750 make exceptions for this.  Our decision will be guided by the two goals
   751 of preserving the free status of all derivatives of our free software and
   752 of promoting the sharing and reuse of software generally.
   753 
   754     NO WARRANTY
   755 
   756   11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
   757 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
   758 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
   759 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
   760 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   761 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
   762 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
   763 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
   764 REPAIR OR CORRECTION.
   765 
   766   12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
   767 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
   768 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
   769 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
   770 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
   771 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
   772 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
   773 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
   774 POSSIBILITY OF SUCH DAMAGES.
   775 
   776      END OF TERMS AND CONDITIONS