Fetch URL only if enabled in the user config

src/sipvoiplink.cpp

@@ -1954,6 +1954,8 @@ void call_on_tsx_changed(pjsip_inv_session *inv, pjsip_transaction *tsx, pjsip_e
 
             /******************************************* URL HOOK *********************************************/
 
+            if (Manager::instance().getConfigString (HOOKS, URLHOOK_SIP_ENABLED) == "1") {
+
                 std::string header_value;
             
                 header_value = fetch_header_value (rdata->msg_info.msg, Manager::instance().getConfigString (HOOKS, URLHOOK_SIP_FIELD));
@@ -1962,6 +1964,7 @@ void call_on_tsx_changed(pjsip_inv_session *inv, pjsip_transaction *tsx, pjsip_e
                     urlhook->addAction (header_value, 
                                         Manager::instance().getConfigString (HOOKS, URLHOOK_COMMAND));
                 }
+            }
 
             /************************************************************************************************/