stroke: re-enable modeconfig keyword

src/libcharon/plugins/stroke/stroke_config.c

@@ -731,7 +731,7 @@ static peer_cfg_t *build_peer_cfg(private_stroke_config_t *this,
 		msg->add_conn.me.sendcert, unique,
 		msg->add_conn.rekey.tries, rekey, reauth, jitter, over,
 		msg->add_conn.mobike, msg->add_conn.aggressive,
-		TRUE,
+		msg->add_conn.pushmode == 0,
 		msg->add_conn.dpd.delay, msg->add_conn.dpd.timeout,
 		msg->add_conn.ikeme.mediation, mediated_by, peer_id);