title: How to ignore headers when running a mocked request with nock?
body: <p>I need to mock a request using <code>nock</code> module, which is issued by a module that adds extra headers (<code>x-md5-checksum</code>). And the request does not match because of those headers.</p>
  
  <p>How do I force nock to ignore this header and match the request anyways?</p>
  
  <p>Thanks.</p>