Wait for discovery end to publish omemo devicelist and bundle

Add sv_ev_connection_features_received for that purpose

src/event/server_events.c

@@ -176,6 +176,14 @@ sv_ev_roster_received(void)
     plugins_on_connect(account_name, fulljid);
 }
 
+void
+sv_ev_connection_features_received(void)
+{
+#ifdef HAVE_OMEMO
+    omemo_publish_crypto_materials();
+#endif
+}
+
 void
 sv_ev_lost_connection(void)
 {