Update ms2 for iOS orientation fix
RPM for redhat
Linphone for redhat documentaton
Add generation of linphone_gitversion.h when using cmake.
Add option to enable video when compiling using cmake.
Update oRTP and ms2 submodules.
Add git clone in the README
update README for mac
fix README
Merge branch 'master' of git.linphone.org:linphone
update README for mac
make sure call media encryption call param is not 'fixed' in case of ZRTP
fix 3 way equality operation
Merge branch 'master' of git.linphone.org:linphone
update README for macos
again
Free memory allocated by ortp_strdup() with ortp_free() instead of free() to prevent crashes on Windows.
update README for mac
update README.macos
Install pdb file for Debug configuration on Windows when using cmake.
Add check to prevent crashes when using a wrapper about liblinphone.

If a wrapper holds a reference to a linphone call and the core is destroyed, the call can keep a reference to a core that no longer exists. This can cause some random crashes.