title: Google cloud load balancer custom http header is missing
body: <p>While using Google Cloud HTTPS Load Balancer we hit the following bug. Couldn't find any information on it.</p>
  
  <p>We have a custom http header in our request:
  <code>X-&lt;Company name&gt;-abcde</code>. If we are working directly against the server all is good, but once we are working through the load balancer, than our custom header is missing. We didn't find any reference in the documentation that there is a need to white list our headers or something like that.</p>
  
  <p>Why my custom header is not being transferred to my backend server while working through Google Cloud Load Balancer? And how to make it work?</p>
  
  <p>Thanks</p>