feat: Backend reports default permissions.

When any of the backend is used 'anonymous', 'jitsi-anonymous', 'internal_hashed', 'internal_plain', 'cyrus' and a participant becomes a moderator, because of external module or because set from jicofo we send to client with the self-presence about becoming moderator a default set of permissions which can be controlled via prosody config.
If using 'token' authentication the above applies only if there is a token and the token does not contain context.features.

resources/prosody-plugins/mod_muc_meeting_id.lua

@@ -12,6 +12,8 @@ local presence_check_status = main_util.presence_check_status;
 
 local QUEUE_MAX_SIZE = 500;
 
+module:depends("jitsi_permissions");
+
 -- Common module for all logic that can be loaded under the conference muc component.
 --
 -- This module: