• Added config option to disable bridging m.notice messages (thanks to @jzapataikono in #280).
• Added options to automatically ratchet/delete megolm sessions to minimize access to old messages.
• Added option to not set room name/avatar even in encrypted rooms.
• Added option to disable reply fallbacks entirely.
• Added notice message when a call is received on Messenger.
• Redid backfill system to support MSC2716.
  • Note that using Synapse's MSC2716 implementation is not recommended, and the bridge can still backfill messages without MSC2716.
• Implemented appservice pinging using MSC2659.
• Possibly improved MQTT connection handling.
• Fixed bridging profile pictures for Instagram users.
• Fixed MQTT connection failing in certain cases when Facebook returned weird data in the chat list.