Configurable max number of breakout rooms

audio-manager: refactor client-side mute/unmute

Use this wisely: breakoutRoomLimit parameter was introduced to controll max number of breakout rooms.

video-provider: fix mesh stream sorting with multiple cameras

Add individual messages to video disable

Add a client-side microphone mute/unmute

Should increase client-server mute state consistency

The mic mute is done client side via the track`s enabled flag, which generates silent when false. This still tracks the server/freeswitch mute state, so server-side mutes will be reproduced in the client

Pulled HTML5 locales Sept 9, 2020

Meeting end callback url

Fix banned users log

Normalize custom parameters

Merge branch 'v2.2.x-release' of github.com:bigbluebutton/bigbluebutton into meeting-end-callback-url

 - add meetingEndedURL and endWhenNoModerator create param
 - meetingEndedURL is complete
 - endWhenNoModerator is partially implemented. Will be continued in another PR.

Prevent non presenters to start/stop an external video

Add check when start/stop an external video

Co-authored-by: Anton Georgiev <antobinary@users.noreply.github.com>

Update saved users text file data

Also delete opus files in freeswitch cache dir

Only wav files in freeswitch cache directory were deleted. With this PR also opus files are deleted.

Update minBrowserVersions

video-provider: add missing PropType, remove render socketOpen check

screenshare: improve screenshare service findOne calls

Include voice user's upsert to changes observer

Also trim down prop assignment in render

That check doesnt make sense anymore. Removing it makes the video list load faster and webcam sharing seem more responsive