title: 404 error with url ending with ICO
body: <p>I am running on ubuntu 15.04, nginx 1.6.2</p>
  
  <p>When i access my web app url e.g <a href="http://example.com/563sd177348ead0e8a028b45af/xxxico" rel="nofollow">http://example.com/563sd177348ead0e8a028b45af/xxxico</a></p>
  
  <p>I realised that whenever my url ends with "ico", nginx will throw a 404 error. </p>
  
  <p><a href="http://example.com/563sd177348ead0e8a028b45af/xxxxxx" rel="nofollow">http://example.com/563sd177348ead0e8a028b45af/xxxxxx</a> is accessible though</p>
  
  <p>Can anyone advice?</p>