docs: function stop() {
          logger.log('debug', 'M|stop', meta);
          var deferred = Q.defer();  // resolved by the 'exit' event
          actionQueue.add({
              "action" : "shutdown",
              "params" : {
                  "forcefull" : true,
                  "deferred"  : deferred
              }
          });
          return deferred.promise;
      }