GitLab

- note : not functional, test is bugged and commented. To be fixed.

- allow cancellation during upload or download
+ fix bug in file transfer message tester

add linphone core api and setting to allow forcing the video capture size, and take a snapshot of preview during calls.

add linphone_proxy_config_pause_register()
make linphone_core_remove_proxy_config() really send unregister.

fill media information when sending interval report too and added unit test for it (quality_reporting_interval_report)

Quality reporting: disabled interval report per default and add minimal value when set (120 seconds minimum)

Quality reporting: add possibility to send interval reports to a given spacing interval during a call

Quality reporting: rename parameters send_statistics to quality_reporting_enabled and statistics_collector to quality_repotring_collector

Add an API to set and retrieve chat messages "app data". This allows clients to store resilient data for each messages