title: cant start nancy self host without admin rights
body: <p>My app uses Nancy Selfhosting. When I launch it without admin rights I get a System.Net.HttpListenerException "Access Denied".</p>
  
  <p>Here is the code:</p>
  
  <pre><code>static void Main(string[] args)
      {   
          var nancyHost = new Nancy.Hosting.Self.NancyHost(new Uri("http://localhost:80/"));
          nancyHost.Start();
          Application.Run();
      }
  </code></pre>
  
  <p>I have also tried different ports without success. Strangely, I dont get any Exceptions when launching a HttpListener that listens to the same Url.  What could be causing this exception?</p>