• Breaking change (mediaproxy) Changed GetMediaResponseFile to return the mime type from the callback rather than in the return get media return value. The callback can now also redirect the caller to a different file.
• (federation) Added join/knock/leave functions (thanks to @nexy7574 in #422).
• (federation/eventauth) Fixed various incorrect checks.
• (client) Added backoff for retrying media uploads to external URLs (with MSC3870).
• (bridgev2/config) Added support for overriding config fields using environment variables.
• (bridgev2/commands) Added command to mute chat on remote network.
• (bridgev2) Added interface for network connectors to redirect to a different user ID when handling an invite from Matrix.
• (bridgev2) Added interface for signaling message request status of portals.
• (bridgev2) Changed portal creation to not backfill unless CanBackfill flag is set in chat info.
• (bridgev2) Changed Matrix reaction handling to only delete old reaction if bridging the new one is successful.
• (bridgev2/mxmain) Improved error message when trying to run bridge with pre-megabridge database when no database migration exists.
• (bridgev2) Improved reliability of database migration when enabling split portals.
• (bridgev2) Improved detection of orphaned DM rooms when starting new chats.
• (bridgev2) Stopped sending redundant invites when joining ghosts to public portal rooms.
• (bridgev2) Stopped hardcoding room versions in favor of checking server capabilities to determine appropriate /createRoom parameters.