title: How to make sure that a network request was sent with Qt 5?
body: <p>I'm using <code>QNetworkAccessManager</code> to send HTTP GET/POST requests. Sometimes I would like to send a request immediately before closing the application. There is no need for me to wait for the server reply. But when I do that, the request doesn't seem to get through.</p>
  
  <p>After calling <code>get()</code>, how can I make sure that the request was sent before destroying the application?</p>