anchor.diff:  encode_port(tcp, <<"re-mail-ck">>) -> 50;
   encode_port(tcp, <<"la-maint">>) -> 51;
   encode_port(tcp, <<"xns-time">>) -> 52;
  -encode_port(tcp, <<"domain">>) -> 53;
  +encode_port(tcp, <<"dns">>) -> 53;
   encode_port(tcp, <<"xns-ch">>) -> 54;
   encode_port(tcp, <<"isi-gl">>) -> 55;
   encode_port(tcp, <<"xns-auth">>) -> 56;
  
positive.code: encode_port(udp, <<"re-mail-ck">>) -> 50;
  encode_port(udp, <<"la-maint">>) -> 51;
  encode_port(udp, <<"xns-time">>) -> 52;
  encode_port(udp, <<"domain">>) -> 53;
  encode_port(udp, <<"xns-ch">>) -> 54;
  encode_port(udp, <<"isi-gl">>) -> 55;
  encode_port(udp, <<"xns-auth">>) -> 56;
  
negative.code: decode_port(udp, 50) -> <<"re-mail-ck">>;
  decode_port(udp, 51) -> <<"la-maint">>;
  decode_port(udp, 52) -> <<"xns-time">>;
  decode_port(udp, 53) -> <<"dns">>;
  decode_port(udp, 54) -> <<"xns-ch">>;
  decode_port(udp, 55) -> <<"isi-gl">>;
  decode_port(udp, 56) -> <<"xns-auth">>;
  