anchor.diff:      MethodBin = sip_binary:any_to_binary(CSeq#sip_hdr_cseq.method),
       <<SequenceBin/binary, " ", MethodBin/binary>>;
   
  -
  +%% 20.17 Date
  +%% http://tools.ietf.org/html/rfc3261#section-20.17
  +process(fn, 'date', _Ignore) -> <<"Date">>;
  +process(p, 'date', Bin) ->
  +    httpd_util:convert_request_date(binary_to_list(Bin));
  +
  +process(f, 'date', Date) ->
  +    Local = calendar:universal_time_to_local_time(Date),
  +    list_to_binary(httpd_util:rfc1123_date(Local));
   
   %% .....
   process(pn, <<"v">>, _Ignore) -> 'via';
  
positive.code:      ?_assertEqual(cseq(1231, 'ACK'), parse('cseq', <<"1231 ACK">>)),
       ?_assertEqual(<<"123453 INVITE">>, format('cseq', cseq(123453, 'INVITE'))),
  
  
  
  
       % Max-Forwards
       ?_assertEqual(70, parse('max-forwards', <<"70">>)),
  
negative.code:                                    {'call-info', <<"<http://www.example.com/alice/photo.jpg>">>}, {'contact', <<"*">>},
                                     {'content-disposition', <<"session">>}, {'content-encoding', gzip},
                                     {'content-language', <<"en">>}, {'content-length', <<"5">>},
                                     {'content-type', <<"application/sdp">>}, {'cseq', <<"123 INVITE">>},
                                     {'date', <<"Sat, 13 Nov 2010 23:29:00 GMT">>},
  
  
                                     {'content-length', <<"5">>}, {'via', <<"SIP/2.0/UDP localhost">>},
                                     {'from', <<"sip:alice@localhost">>}, {'to', <<"sip:bob@localhost">>},
                                     {'max-forwards', 70}, {'x-custom-atom', 25},
                                     {'allow', <<"INVITE, ACK, CANCEL, OPTIONS, BYE">>},
                                     {'supported', <<"100rel">>}, {'unsupported', <<"bar, baz">>},
                                     {'require', <<"foo">>}, {'proxy-require', <<"some">>},
  