anchor.diff:      %% so this value will be overwritten (see "ipv6_" below).
       %% </IPv6>
   
  -    %% This will fail for the ipv6_ - cases (but that is ok)
  -    ProxyExceptions = ["localhost", ?IPV6_LOCAL_HOST], 
  -    tsp("init_per_testcase -> Options before proxy set: ~n~p", 
  -	[httpc:get_options(all)]),
  -    ok = httpc:set_options([{proxy, {{?PROXY, ?PROXY_PORT}, ProxyExceptions}}]),
  -    tsp("init_per_testcase -> Options after proxy set: ~n~p", 
  -	[httpc:get_options(all)]),
       inets:enable_trace(max, io, httpc),
       %% inets:enable_trace(max, io, all),
       %% snmp:set_trace([gen_tcp]),
  
positive.code:     DummyServerPid ! stop,
      ok = httpc:set_options([{ipfamily, inet6fb4}]), 
      ok.
  
  
  %%-------------------------------------------------------------------------
  
  proxy_not_modified_otp_6821(doc) ->
      ["If unmodified no body should be returned"];
  proxy_not_modified_otp_6821(suite) ->
      [];
  proxy_not_modified_otp_6821(Config) when is_list(Config) ->
      case ?config(skip, Config) of 
  	undefined ->
  	    provocate_not_modified_bug(?PROXY_URL);
  	Reason ->
  	    skip(Reason)
      end.
  
  
  %%-------------------------------------------------------------------------
  
negative.code:      options,
       headers_as_is, 
       selecting_session, 
       {group, ssl}, 
       {group, stream}, 
       {group, ipv6}, 
  