GitLab

Fix problem with missing SDP in 200 OK when the call is in early-media. We should recover correctly, we were not.
Also introduced the corresponding unit test.

There is now an "SDP handling mode": you can choose between normal, simulate removal of SDP or simulate SDP error.
This allows for simulating 200 OK without SDP, for instance (a unit test is coming for this).

All multicast tests are passed on windows

Conflicts:
	coreapi/remote_provisioning.c

rework multicast. It is not necessary to bind to the multicast address. 0.0.0.0 just works while the binding to the multicast address is rejected on windows
fixes reading provisionning config file from disk on windows.