Allow the application to resize the window without destroying the OpenGL context

patch-pulse (from ahoka@NetBSD.org):

Fix assertion triggered in pulsaudio by returning "unknown" instead
of NULL pointer when guessing application name.

- Use getprogname on NetBSD as it wont return NULL

patch-ac (from mrg@NetBSD.org):
Look for libGL.so, not any particular libGL.so.<X>, on NetBSD.
(the comment inline explains why)

patch-ab (from reinoud@NetBSD.org):
Apply patch to first unlock the CD before trying to eject it. Since
SDL doesn't seem to have lock/unlock primitives, this looks like the
right thing to do.

Fixes audio/tcd's eject function too.

It helps to use the right constant. :)

Use SDL's byte order check, just to be sure

Don't call it "ALSA 0.9 PCM audio" anymore, since we moved to the stable API.

Fixed building on Mac OS X

Fixed bug #728

I am using a headset on my monitor as primary sound output device. From time to
time it happens that I switch off my monitor when I leave my computer and
switch it on when I come back.
When doing so while wesnoth is running I get no sound back when I switch on my
monitor. There is probably good reason for that. Therefore I wanted to exit and
restart wesnoth. Unfortunately, wesnoth always hangs in this situation. It
looks like wesnoth can not be exited when the primary sound device vanished.
I created a backtrace of this situation (please see attachment).

Thilo helped me track down the audio issue with 22050 hz stereo sound. Yay!