call-park - better debug

park in lowercase so we can grep easily

kamailio/default.cfg

@@ -588,7 +588,7 @@ onreply_route[INTERNAL_REPLY]
     ##### CALL-PARK ####
     if (is_method("REFER") && t_check_status("(200)|(202)") ) {
         $sht(park=>$(avp(refer_to_uri){uri.user})@$(avp(refer_to_uri){uri.domain})) = "sip:" + $(ct{tobody.uri}{uri.host}) + ":" + $(ct{tobody.uri}{uri.port});
-        xlog("L_INFO", "PARK $(avp(refer_to_uri){uri.user})@$(avp(refer_to_uri){uri.domain}) = sip:$(ct{tobody.uri}{uri.host}):$(ct{tobody.uri}{uri.port})");
+        xlog("L_INFO", "caching park info $(avp(refer_to_uri){uri.user})@$(avp(refer_to_uri){uri.domain}) = sip:$(ct{tobody.uri}{uri.host}):$(ct{tobody.uri}{uri.port})");
     }
 
     if ($rs < 300) {