Try to start sessions with every jid in roster

src/event/server_events.c

@@ -174,6 +174,10 @@ sv_ev_roster_received(void)
 
     const char *fulljid = connection_get_fulljid();
     plugins_on_connect(account_name, fulljid);
+
+#ifdef HAVE_OMEMO
+    omemo_start_sessions();
+#endif
 }
 
 void