title: QNetworkAccessManager and HTTP persistent connection
body: <p>HTTP 1.1 supports persistent connection by default, so I want to send my a second http request using the same connection that was setup when the first HTTP request was made. how can this be achieved through Qt?</p>
  
  <p>If I simply make the second request after the first one finished like the following </p>
  
  <pre><code>manager-&gt;get(QNetworkRequest(QUrl("http://qt-project.org")));
  </code></pre>
  
  <p>it seems a new TCP connection to the server will be initiated (I have checked with a network sniffer)
  The experiment also says: If the reply is deleteLater() or abort() within
  finished() signal, the connection will be closed.</p>