title: NSMutableURLRequest setting authorization header
body: <p>When setting the “Authorization” header of a <code>NSMutableURLRequest</code>, my server’s response of headers does not include that header:</p>
  
  <pre><code>[Host] =&gt; myhost.com
  [Content-Type] =&gt; application/x-www-form-urlencoded
  [Connection] =&gt; keep-alive
  [Accept] =&gt; */*
  [User-Agent] =&gt; MyApp/1 CFNetwork/758.3.15 Darwin/15.4.0
  [Content-Length] =&gt; 327
  [Accept-Language] =&gt; en-gb
  [Accept-Encoding] =&gt; gzip, deflate
  </code></pre>
  
  <p>I read the documentation suggest not setting this here, so where should I set the authorisation header on the client side?</p>
  
  <p>The purpose of my <code>Authorization</code> header is to send along my Oauth signature and other Oauth related information</p>