anchor.diff:  
   Gorouter generates an access log in the following format when it receives a request:
   
  -`<Request Host> - [<Start Date>] "<Request Method> <Request URL> <Request Protocol>" <Status Code> <Bytes Received> <Bytes Sent> "<Referer>" "<User-Agent>" <Remote Address> <Backend Address> x_forwarded_for:"<X-Forwarded-For>" x_forwarded_proto:"<X-Forwarded-Proto>" vcap_request_id:<X-Vcap-Request-ID> response_time:<Response Time> gorouter_time:<GoRouter Time> app_id:<Application ID> app_index:<Application Index> x_cf_routererror:<X-Cf-RouterError> <Extra Headers>`
  +`<Request Host> - [<Start Date>] "<Request Method> <Request URL> <Request Protocol>" <Status Code> <Bytes Received> <Bytes Sent> "<Referrer>" "<User-Agent>" <Remote Address> <Backend Address> x_forwarded_for:"<X-Forwarded-For>" x_forwarded_proto:"<X-Forwarded-Proto>" vcap_request_id:<X-Vcap-Request-ID> response_time:<Response Time> gorouter_time:<Gorouter Time> app_id:<Application ID> app_index:<Application Index> x_cf_routererror:<X-Cf-RouterError> <Extra Headers>`
   
   Gorouter access logs are also redirected to syslog.
   
  
positive.code: 
  * `Response Time` is the total time it takes for the request to go through the Gorouter to the app
     and for the response to travel back through the Gorouter.
     This includes the time the request spends traversing the network to the app and back again to the Gorouter.
     It also includes the time the app spends forming a response.
  
  * `GoRouter Time` is the total time it takes for the request to go through the Gorouter
     initially plus the time it takes for the response to travel back through the Gorouter.
     This does not include the time the request spends traversing the network to the app.
     This also does not include the time the app spends forming a response.
  
  * `X-CF-RouterError` is populated if the Gorouter encounters an error. This can
     help distinguish if a non-2xx response code is due to an error in the Gorouter
     or the backend. For more information on the possible Router Error causes go to
     the [#router-errors](#router-errors) section.
  
  ##### <a id="router-errors"></a> Router Errors
  
  The value of the `X-Cf-Routererror` header can be one of the following:
  
  <table>
    <tr>
  
negative.code:   </tr>
    <tr>
      <td><code>Connection Limit Reached</code></td>
      <td>The backends associated with the route have reached their maximum number of connections. The maximum  number of connection for backends is set via the property <code>router.backends.max_conns</code> in the <a href="https://github.com/cloudfoundry/routing-release/blob/master/jobs/gorouter/spec">Gorouter spec</a>.</td>
    </tr>
    <tr>
      <td><code>route_service_unsupported</code></td>
      <td>Route services are not enabled. You can enable route services with the property <code>router.route_services_secret</code> in the <a href="https://github.com/cloudfoundry/routing-release/blob/master/jobs/gorouter/spec">Gorouter spec</a>. If the property is empty, route services are disabled.</td>
    </tr>
    <tr>
      <td><code>endpoint_failure</code></td>
  