anchor.diff:        [{<<"content-type">>, <<"application/octet-stream">>},
          {<<"content-disposition">>,
           <<"attachment; filename=\"ASCII.bin\"">>},
  -       {<<"etag">>, ETag},
  -       {<<"cache-control">>, <<"public,max-age=", RefreshString/binary>>},
  -       {<<"expires">>, _},
  +       {<<"cache-control">>, <<"public">>},
  +       {<<"expires">>, _},
  +       {<<"etag">>, ETag},
          {<<"last-modified">>, LastModified},
          {<<"date">>, _},
          {<<"accept-ranges">>, <<"bytes">>}],
  
positive.code:       [{<<"content-type">>, <<"text/plain">>},
         {<<"content-disposition">>,
          <<"attachment; filename=\"" ?WRITABLE_FILENAME1 "\"">>},
         {<<"etag">>, ETag8},
         {<<"cache-control">>, <<"public,max-age=1">>},
         {<<"expires">>, _},
         {<<"last-modified">>, LastModified8},
         {<<"date">>, _},
         {<<"accept-ranges">>, <<"bytes">>}],
  
negative.code:       [{<<"content-type">>, <<"application/octet-stream">>},
         {<<"content-disposition">>,
          <<"attachment; filename=\"ASCII.bin\"">>},
         {<<"cache-control">>, <<"public">>},
         {<<"expires">>, _},
         {<<"etag">>, ETag},
         {<<"last-modified">>, LastModified},
         {<<"date">>, _},
         {<<"accept-ranges">>, <<"bytes">>}],
  