message: Don't answer any msgtypes other than text in a admin room.
diff: @@ -1115,7 +1115,8 @@ MatrixHandler.prototype._onMessage = Promise.coroutine(function*(req, event) {
  let ircAction = IrcAction.fromMatrixAction(mxAction);
  let ircRooms = yield this.ircBridge.getStore().getIrcChannelsForRoomId(event.room_id);
  - if (ircRooms.length === 0) {
  + // Sometimes bridge's message each other and get stuck in a silly loop. Ensure it's m.text
  + if (ircRooms.length === 0 && event.content && event.content.msgtype === "m.text") {
  // could be an Admin room, so check.
  let adminRoom = yield this.ircBridge.getStore().getAdminRoomById(event.room_id);
  if (!adminRoom) {
  