mirror back record-route header in options

src/mod/endpoints/mod_sofia/sofia.c

@@ -8603,7 +8603,8 @@ void sofia_handle_sip_i_options(int status,
 			(sess_count >= sess_max || !sofia_test_pflag(profile, PFLAG_RUNNING) || !switch_core_ready_inbound())) {
 		nua_respond(nh, 503, "Maximum Calls In Progress", NUTAG_WITH_THIS_MSG(de->data->e_msg), SIPTAG_RETRY_AFTER_STR("300"), TAG_END());
 	} else {
-		nua_respond(nh, SIP_200_OK, NUTAG_WITH_THIS_MSG(de->data->e_msg), TAG_END());
+		nua_respond(nh, SIP_200_OK, NUTAG_WITH_THIS_MSG(de->data->e_msg), 
+					TAG_IF(sip->sip_record_route, SIPTAG_RECORD_ROUTE(sip->sip_record_route)), TAG_END());
 	}
 
 }