Use of unref() via request.socket

gistfile1.js

var http = require( 'http' );

var server = http.createServer( function( request , response ) {
  request.socket.unref();
  console.log( request.socket.remoteAddress );
  response.writeHead( 200 , { 'Content-Type' : 'text/plain' } );
  response.end( 'working!' );
});

server.listen( 1492 , '127.0.0.1' );
console.log( 'Listening on http://127.0.0.1:1492' );