fix dashcast build with the latest libav - version detection patch in libav_compat.h by Nicolas Martyanoff (see https://sourceforge.net/p/gpac/discussion/287546/thread/dc9d5ae0)

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5232 63c20433-aa62-49bd-875c-5a186b69a8fb
fix gettimeofday duplicate in dashcast

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5233 63c20433-aa62-49bd-875c-5a186b69a8fb
set name class hint for x11 module - patch by Nicolas Martyanoff (see https://sourceforge.net/p/gpac/discussion/287546/thread/dc9d5ae0)

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5234 63c20433-aa62-49bd-875c-5a186b69a8fb
fix segfault when using ^C on MP4Client, txt can be null. Patch by Nicolas Martyanoff (see https://sourceforge.net/p/gpac/discussion/287546/thread/dc9d5ae0)

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5235 63c20433-aa62-49bd-875c-5a186b69a8fb
fix missing GF_EXPORT for Unix (by Nicolas Martyanoff in https://sourceforge.net/p/gpac/discussion/287546/thread/dc9d5ae0)

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5236 63c20433-aa62-49bd-875c-5a186b69a8fb
dashcast: add missing audiio resampling (using an intermediate audio format)

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5237 63c20433-aa62-49bd-875c-5a186b69a8fb
coding style

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5238 63c20433-aa62-49bd-875c-5a186b69a8fb
move code into functions

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5239 63c20433-aa62-49bd-875c-5a186b69a8fb
export rfc6381 to fix dashcast hardcoded codec

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5240 63c20433-aa62-49bd-875c-5a186b69a8fb
misc build fix + leak

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5241 63c20433-aa62-49bd-875c-5a186b69a8fb
fix dashcast old linux (Debian 7) build

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5242 63c20433-aa62-49bd-875c-5a186b69a8fb
fix minGW build

git-svn-id: svn://svn.code.sf.net/p/gpac/code/trunk/gpac@5243 63c20433-aa62-49bd-875c-5a186b69a8fb
add a git ignore file