https://gitlab.linphone.org/BC/public/liblinphone/merge_requests/1076

Update Add participant test to verify that linphone_chat_room_find_participant returns NULL is the participant is not found

* bctoolbox: fix build of Flexisip on Archlinux
* liblinphone: fix build of Flexisip on macOS

with all commits from bc branch merged and rebased in the master branch
of the original repository

Let the server group chatroom choose a default conference address, with domain name set according to the used ProxyConfig. This is necessary for multi-domain usage of conference server.

Fix test failure in Group Chat suite
Add media_resource_mode to the linphone config under section misc

Update liblinphone after deleting server group chat room as soon as it starts the termination process

* https://gitlab.linphone.org/BC/public/liblinphone/merge_requests/1034
* https://gitlab.linphone.org/BC/public/liblinphone/merge_requests/1047

Update liblinphone after verifying that an offline participant can be correctly removed from ma server group chat room

Update liblinphone after verifying that an offline participant can be correctly removed from ma server group chat room

Update liblinphone after fixing crash in server group chat room due to usage of pointers of participants and participant devices when creating notifies

Factory's char * NEED to return null if string is empty, otherwise default values from build are not set
(especially for MsPluginDir, resulting in wrong echo canceller choice)

Fixed crash, mUserData wasn't initialized

fixed belle-sip toString indent