anchor.diff:  # you're not sure what that is, see here:
   #
   #   https://www.varnish-cache.org/trac/browser/bin/varnishd/default.vcl?rev=3.0
  +import std;
   
   acl purge_acl {
     "localhost";
  
positive.code:     } else {
        # Wildcard purging
        ban("req.url ~ "+req.url);
        error 200 "Purged.";
      }
    }
  
negative.code: director frontend_app round-robin {
    { .backend = frontend_app_1; }
    { .backend = frontend_app_2; }
  }
  
  sub redirect_slash {
    # http://example.org/foo/ -> http://example.org/foo
  