title: NSURLSessionConfiguration timeoutIntervalForRequest doesn't seem to work with the background session
body: <p>The new timeout property of NSURLSessionConfiguration doesn't seem to work when the session is set to work in background (via backgroundSessionConfiguration call). </p>
  
  <p>Anybody know if that's really the case? </p>
  
  <p>Code snippet: </p>
  
  <pre><code>NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration backgroundSessionConfiguration:bgSessionConfigIdentifier];
  sessionConfig.HTTPMaximumConnectionsPerHost = 1;
  sessionConfig.timeoutIntervalForRequest = 60;
  </code></pre>
  
  <p>Do I need to do anything extra for the timeout to work?</p>