x-forwarded-host

I don't think you can insert multiple header name/values with an HTTP profile. There's probably a request for enhancement to support this. You could open a case with F5 Support to ask to have your case attached to the RFE.

In the meantime, you can use an iRule to insert multiple HTTP headers:

  
  when HTTP_REQUEST {  
    
      Insert GOHTTPS and x-forwarded-host with corresponding values  
     HTTP::header insert GOHTTPS 1 x-forwarded-host [HTTP::host]  
  }  
  

Aaron