Misc (re #1751): added additional checking to invite and dialog instances when terminating the call when media initialization fails due to suspected crash

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@4856 74dad513-b988-da41-8d7b-12977e46ad98
Misc (re #1751): fixed problem in r4852 which caused sound not to be opened

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@4857 74dad513-b988-da41-8d7b-12977e46ad98
Misc (re #1751): fixed error when retrieving SSL error. Thanks Vittorio Giovara for the patch

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@4858 74dad513-b988-da41-8d7b-12977e46ad98
Forcing empty folder(s) into repository.
Converted svn:ignore properties to .gitignore.
Converted svn:externals properties to .gitmodules.
Rework libavcodec and libavutil version checking

 * Add macros to check against both libav and ffmpeg.
 * Group together similar functions.
 * Remove extremely old deprecated and unused functions.
 * Fix many wrong version checks.

Signed-off-by: Vittorio Giovara <vittorio.giovara@savoirfairelinux.com>
Update pixel format enum to the AV-prefixed version

This ensures future breakage and provides a compatibility layer.

Signed-off-by: Vittorio Giovara <vittorio.giovara@savoirfairelinux.com>
Update codec id enum to the AV-prefixed version

This ensures future breakage and provides a compatibility layer.

Signed-off-by: Vittorio Giovara <vittorio.giovara@savoirfairelinux.com>
ssl_sock: update the tests to use modern ciphers

DES is very old and vulnerable and should not be used as test element.
Choose the closest cipher available (3DES) in order to support more backends.
add gnutls
all setCC