Same for sac3 Qclq and sqcp

http://forum.inmatrix.com/index.php?showtopic=6891 sac3
http://forum.videolan.org/viewtopic.php?f=7&t=80308 Qclq
http://discussions.apple.com/thread/750107?threadID=750107 sqcp

This allows specifying the libavcodec decoder/encoder by name
Useful in case there are more than one codec per fourcc

Example: ffvp8 / libvpx decoders for VP8

The VLC contrib patches for live555 are mandatory otherwise it will
not work correctly. Thus, linking directly from the live555 source tree
is not something that should be encouraged or even supported.

live555 should either be installed or built from contrib instead.

DLLs are named after their version (libvlc-5.dll) on wince

no sign of availability of real video DLLs for x86_64

fixes #5508

This reverts commit f2dfc28e.

Generates correct assembly and fix vp8 crash

Properly take the recursive event_sending_lock when looking for listener to
send the event.
Ensure that there will be no event dispatch after vlc_event_detach().

Also, fix a bug in libvlc_event where removing an event handler from an event
callback would lead to a crash.

 * Comment out checks for GL ES, as the plugins are not working.
 * Check libGL only once.
 * Disable EGL by default as it is incomplete and does not correctly
   check for version (1.4 or later is assumed).
 * Only the generic OpenGL output if EGL is available, as there are
   currently no other OpenGL provider plugins.

This reverts commit 07df00dc.

This broke compilation.

This reverts commit 5b859717.

This reverts commit 23e0cb9f.