remove double escape from json

(cherry picked from commit 7a86589bd3)

kamailio/presence-query.cfg

@@ -77,7 +77,7 @@ route[PRESENCE_SEARCH_DETAIL]
         while($xavp(ra) != $null) {
            $var(Event) = $xavp(ra=>event);
            while($xavp(ra) != $null && $var(Event) == $xavp(ra=>event)) {
-              $var(Sub) = $_s("$var(Username)" : {"$xavp(ra=>event)" : { "$xavp(ra=>watcher_username)" : {"kamailio@MY_HOSTNAME" : {"$xavp(ra=>callid)" : {"time" : $xavp(ra=>time),  "result" : $xavp(ra=>result), "sent" : "$(xavp(ra=>sent_msg){s.escape.common}{s.replace,\','}{s.replace,$$,})", "received" : "$(xavp(ra=>received_msg){s.escape.common}{s.replace,\','}{s.replace,$$,})", "user_agent" : "$(xavp(ra=>user_agent){s.escape.common}{s.replace,\','}{s.replace,$$,})"}}}}});
+              $var(Sub) = $_s("$var(Username)" : {"$xavp(ra=>event)" : { "$xavp(ra=>watcher_username)" : {"kamailio@MY_HOSTNAME" : {"$xavp(ra=>callid)" : {"time" : $xavp(ra=>time),  "result" : $xavp(ra=>result), "sent" : "$(xavp(ra=>sent_msg){s.escape.common}{s.replace,\','}{s.replace,$$,}{re.subst,/\\\\\\"/\\"/g})", "received" : "$(xavp(ra=>received_msg){s.escape.common}{s.replace,\','}{s.replace,$$,})", "user_agent" : "$(xavp(ra=>user_agent){s.escape.common}{s.replace,\','}{s.replace,$$,})"}}}}});
               xlog("L_DEBUG", "$ci| RESULT \"Subscriptions\" : { $var(Sub) }\n");
               $var(amqp_payload_request) = '{"Event-Category" : "presence", "Event-Name" : "search_partial_resp", "Msg-ID" : "$var(Msg-ID)", "Subscriptions" : { $var(Sub) } }';
               kazoo_publish("targeted", "$var(Queue)", $var(amqp_payload_request));