code: function enableDestroy(server) {
      var connections = [];
      server.on('connection', function (conn) {
          var key = connections.push(conn);
          conn.on('close', function () {
              delete connections[key];
          });
      });
      server.destroy = function (cb) {
          server.close(cb);
          for (var key in connections)
              connections[key].destroy();
      };
  }
docs: =================================================== === auxiliary function ============================