feat: Sets meeting id using the connect method.

resources/prosody-plugins/mod_fmuc.lua

@@ -437,6 +437,7 @@ local function iq_from_main_handler(event)
     -- if there is password supplied use it
     -- if this is update it will either set or remove the password
     room:set_password(node.attr.password);
+    room._data.meetingId = node.attr.meetingId;
 
     if fire_jicofo_unlock then
         -- everything is connected allow participants to join

resources/prosody-plugins/mod_visitors.lua

@@ -64,7 +64,8 @@ local function send_visitors_iq(conference_service, room, type)
       :tag('visitors', { xmlns = 'jitsi:visitors',
                          room = jid.join(jid.node(room.jid), conference_service) })
       :tag(type, { xmlns = 'jitsi:visitors',
-        password = type ~= 'disconnect' and room:get_password() or ''
+        password = type ~= 'disconnect' and room:get_password() or '',
+        meetingId = room._data.meetingId
       }):up();
 
       module:send(connect_done);