auto start/stop rtmp broadcast

akka-bbb-apps/src/main/resources/application.conf

akka-bbb-apps/src/main/scala/org/bigbluebutton/Boot.scala

...rc/main/scala/org/bigbluebutton/SystemConfiguration.scala

...ain/scala/org/bigbluebutton/core/BigBlueButtonActor.scala

...main/scala/org/bigbluebutton/core/BigBlueButtonInGW.scala

.../src/main/scala/org/bigbluebutton/core/MeetingActor.scala

.../src/main/scala/org/bigbluebutton/core/MeetingModel.scala

...c/main/scala/org/bigbluebutton/core/api/OutMessages.scala

...on/core/pubsub/senders/DeskShareEventRedisPublisher.scala

...core/pubsub/senders/DeskShareMessageToJsonConverter.scala

...ton/freeswitch/pubsub/receivers/RedisMessageReceiver.java

...on/freeswitch/voice/freeswitch/FreeswitchApplication.java

...ice/freeswitch/actions/DeskShareBroadcastRTMPCommand.java