build: Drop unnecessary -D_GNU_SOURCE from libdvd* CFLAGS

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35911 b3059339-0415-0410-9bf9-f77b7e298cf2
configure: Remove redundant double variable initialization

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35912 b3059339-0415-0410-9bf9-f77b7e298cf2
configure: Add toupper() and tolower() utility functions

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35913 b3059339-0415-0410-9bf9-f77b7e298cf2
configure: Simplify option value handling with helper functions

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35914 b3059339-0415-0410-9bf9-f77b7e298cf2
Revert r35912, it breaks compilation.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35915 b3059339-0415-0410-9bf9-f77b7e298cf2
win32: color console
af: winamp dsp audio filter
win32: display played filename in console/video window
win32: added vo native directshow decoder
af: runtime equalizer
input: map control keys using human readable strings
replaced some signed char with unsigned char to fix some subtitle related problems
mpcodecs: make faac encoder dynamic load faac library at runtime
make fontconfig spam while creating font cache
added missing functions proto
audio: disable muting audio at exit on win32, mplayer somehow crashes
qtx: qtx decoder spams on stdout and causes problems while piping streams
input: avoid spam when pressing an unknown key
win32: color termio
win32: force memalign on each alloc to avoid problems with sse code