anchor.diff:      #
       # FIXME: This should be implemented by either the app or the per-app Nginx
       # (by compiling Nginx with the more_headers module, for example).
  +    # FIXME2: The path duplicates logic in the Router.
       #
       # - NS 2012-12-11
       set beresp.http.No-Fallback = "true";
  
positive.code:   # longer than req.grace in vcl_recv.
    set beresp.grace = 6h;
  
    if (req.backend == licensify) {
      # Licensify sends custom 500 errors, and we need to send No-Fallback: true
      # to prevent the CDN from falling back to the mirror site.
      # Unfortunately, with our current build of Nginx we can't use add_headers
  
negative.code:   set req.grace = 6h;
  
    # remove cookies
    # FIXME: Path duplicates logic in Router. See comments in vcl_fetch.
    if (req.url ~ "^/apply-for-a-licence") {
      unset req.http.Cookie;
    }
  
  