anchor.diff:  
     # remove cookies
     if (req.backend != licensify) {
  -    unset req.http.cookie;
  -  }
  +    unset req.http.Cookie;
  +  }
  +
     # purge individual URLs from the cache
  -  if(req.request == "PURGE") {
  -    if(!client.ip ~ purge_acl) {
  +  if (req.request == "PURGE") {
  +    if (!client.ip ~ purge_acl) {
         error 405 "Not allowed";
       } else {
   <% if scope.lookupvar('varnish::varnish_version') == 3 %>
  
positive.code:   # https://www.gov.uk/foo/ -> https://www.gov.uk/foo
    # vcl_error completes the redirect
    # Don't redirect "/" to "".
  
    if (req.url ~ "(.+)/$") {
      set req.http.x-Redir-Url = regsub(req.url, "^(.+)/$", "\1");
      error 667 req.http.x-Redir-Url;
  
negative.code:   unset beresp.http.X-Rack-Cache;
    unset beresp.http.X-Runtime;
  
    # Rewrite any absolute redirects to be correct
    if (beresp.http.Location) {
    <% if @govuk_platform == "production" %>
      set beresp.http.Location = regsub(beresp.http.Location, "^(\w+://[^.]+\.[^.]+\.alphagov\.co\.uk)", "https://www.gov.uk");
  