anchor.diff:  # ...
   listeners:
     external:
  -    type: routes
  +    type: route
       authentication:
         type: tls
       overrides:
  
positive.code: # ...
  listeners:
    external:
      type: routes
      authentication:
        type: tls
      overrides:
  
negative.code: # ...
  listeners:
    external:
      type: route
      authentication:
        type: tls
      overrides:
  