title: How do I get the status description of NSHTTPURLResponse
body: <p>I'm consuming a webservice and when something fails for validation reasons the error message is in the StatusDescription.  I need a way to get that and display it to the user but all I see on NSHTTPURLResponse is the StatusCode and a way to convert the status code to the standard error message.</p>
  
  <p>The web server always returns a 500 status code no matter the data error so I can't infer the problem from the code.</p>