anchor.diff:      proxy_buffering off;
       proxy_set_header        Host            $host;
       proxy_set_header        X-Real-IP       $remote_addr;
  -    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
  +    proxy_set_header        X-Forwarded-For $http_x_forwarded_for;
       proxy_set_header        X-Request-Id    $msec-$remote_addr-$remote_port;
     }
   
  
positive.code:     proxy_buffering off;
      proxy_set_header        Host            $host;
      proxy_set_header        X-Real-IP       $remote_addr;
      proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header        X-Request-Id    $msec-$remote_addr-$remote_port;
    }
  
  
negative.code:     proxy_buffering off;
      proxy_set_header        Host            $host;
      proxy_set_header        X-Real-IP       $remote_addr;
      proxy_set_header        X-Forwarded-For $http_x_forwarded_for;
      proxy_set_header        X-Request-Id    $msec-$remote_addr-$remote_port;
    }
  
  