turn on some extensions by default
turn on some extensions by default

svn path=/trunk/vorbis/; revision=4064

felipebetancur/vorbis,nicolaichuk/vorbis,youfearm3/vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,emscripten-ports/Vorbis,mwgoldsmith/vorbis,erikd/vorbis,nicolaichuk/vorbis,mwgoldsmith/vorbis,eidy/vorbis,youfearm3/vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,emscripten-ports/Vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,felipebetancur/vorbis,ShiftMediaProject/vorbis,emscripten-ports/Vorbis,youfearm3/vorbis,felipebetancur/vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,eidy/vorbis,erikd/vorbis,felipebetancur/vorbis,eidy/vorbis,youfearm3/vorbis,erikd/vorbis,mwgoldsmith/vorbis,nicolaichuk/vorbis,erikd/vorbis,nicolaichuk/vorbis,emscripten-ports/Vorbis,mwgoldsmith/vorbis,eidy/vorbis