anchor.diff:  content_length([_Head | Tail]) ->
      content_length(Tail).
   
  -provocate_not_modified_bug(Url) ->
  -    Timeout = 15000, %% 15s should be plenty
  -
  -    {ok, {{_, 200, _}, ReplyHeaders, _Body}} =
  -	httpc:request(get, {Url, []}, [{timeout, Timeout}], []),
  -    Etag = pick_header(ReplyHeaders, "ETag"),
  -    Last = pick_header(ReplyHeaders, "last-modified"),
  -    
  -    case httpc:request(get, {Url, [{"If-None-Match", Etag},
  -				  {"If-Modified-Since", Last}]},
  -		      [{timeout, 15000}],
  -		      []) of
  -	{ok, {{_, 304, _}, _, _}} -> %% The expected reply
  -	    page_unchanged;
  -	{ok, {{_, 200, _}, _, _}} -> 
  -	    %% If the page has changed since the	
  -	    %% last request we retry to
  -	    %% trigger the bug
  -	    provocate_not_modified_bug(Url);
  -	{error, timeout} ->
  -	    %% Not what we expected. Tcpdump can be used to
  -	    %% verify that we receive the complete http-reply
  -	    %% but still time out.
  -	    incorrect_result
  -    end.
  -
  -pick_header(Headers, Name) ->
  -    case lists:keysearch(string:to_lower(Name), 1,
  -			 [{string:to_lower(X), Y} || {X, Y} <- Headers]) of
  -	false ->
  -	    [];
  -	{value, {_Key, Val}} ->
  -	    Val
  -    end.
  -
  -
   %% -------------------------------------------------------------------------
   
   simple_request_and_verify(Config, 
  
positive.code: 		    ssl_trace, 
  		    essl_trace]}, 
       {stream,  [], [http_stream,
  		    http_stream_once, 
  		    proxy_stream]}, 
       {tickets, [], [hexed_query_otp_6191, 
  		    empty_body_otp_6243,
  		    empty_response_header_otp_6830,
  		    transfer_encoding_otp_6807, 
  		    proxy_not_modified_otp_6821,
  		    no_content_204_otp_6982, 
  		    missing_CR_otp_7304,
  		    {group, otp_7883}, 
  
negative.code: 		?ENSURE_STARTED([crypto, public_key, ssl]), 
  		init_per_testcase_ssl(essl, PrivDir, SslConfFile, 
  				      [{watchdog, Dog} | TmpConfig]);
  
  	    "ipv6_" ++ _Rest ->
  		%% Ensure needed apps (crypto, public_key and ssl) are started
  