Do not send reINVITE when participant is added or removed or changes its media directions if the conference is not currently active

Add echo-calibration command.
Reactivate daemon on Mac.

Updated liblinphone to mark group chat room as read when we receive the Displayed IMDN from another of our devices

Remove OpenH264 from Windows packages.

By default on OGL : do not create a window. It must be explicitly specify to avoid missleading errors.

Set current timestamp if conference must start immediately

- Use options to get human hearing quality.
- Factorize audio format.
- Fix variables that weren't updated in case of different audio format.
- Do not use MixFormat without having set fix parameters (16bits/PCM).
- Fix channel mask.
- Reset Audio Client in case of error.

Fix a crash/no webcam behaviour with msmfoundation : keep only supported formats when selecting one.

- Remove useless error on Wasapi when trying to set unchanged values.
- Fix MKV reader on TrackNumber that can be different in memory space (Windows bug)
- Wasapi: Fix debug feedback
- Wasapi: Fix uninitialized frame count that could lead to have negative buffer.
- Remove mswasapi code from mediastreamer2 and keep it on mswasapi project.

 Modify tests runnign local conference hosted on a device to create them on a server
 Fix do not add rtcp-xr line if it is disabled by the core

In the case of video streams, it will set label and thumbnail flag as soon as they are created

mediastreamer2!621