Remove unnecessary modules and properties (#1697)

* Only enable dialback when s2s is enabled.
* Remove vcard, pep, register modules.
* Only set smacks properties when xmpp ws is enabled.

prosody/rootfs/defaults/conf.d/jitsi-meet.cfg.lua

@@ -117,6 +117,13 @@ asap_accepted_audiences = { "{{ join "\",\"" (splitList "," .Env.JWT_ACCEPTED_AU
 consider_bosh_secure = true;
 consider_websocket_secure = true;
 
+{{ if $ENABLE_XMPP_WEBSOCKET }}
+smacks_max_unacked_stanzas = 5;
+smacks_hibernation_time = 60;
+smacks_max_hibernated_sessions = 1;
+smacks_max_old_sessions = 1;
+{{ end }}
+
 {{ if $ENABLE_JAAS_COMPONENTS }}
 VirtualHost "jigasi.meet.jitsi"
     modules_enabled = {