anchor.diff:  %% - XXX
   %% * contact_param.erl lowercases name-value fields, is this ok for
   %%   contact-params ?
  -%% - yes, this is default acording to the BNF chapter, as I could
  +%% - yes, this is default according to the BNF chapter, as I could
   %%   find no statement to the contrary this presumably applies to
   %%   contact-params as well.
   %% * should char() ranges used by contact-params be check for
  
positive.code: %% Note: string:tokens/2 is used in some places where where sequences
  %%       of separator char() are not allowed, but tokens/2 will only
  %%       "see" one separator char().
  %% Note: contens of quoted-string are not checked
  %%       - there is no need to, it should just be passed along
  %%         acording to RFC 3261
  %% Note: SIP/SIPS-URIs are not parsed into sipurl records, this
  %%       has been done to reduce the amount of parsing needed to be
  %%       done and must therefor be done later - if needed
  
negative.code: %%                /  %xFC-FD 5UTF8-CONT
  %% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  -module(contact).
  %%-compile(export_all).
  
  %%--------------------------------------------------------------------
  %% External exports
  