anchor.diff:  normalize_uriset(UriSet) when is_list(UriSet) ->
       case nksip_lib:is_string(UriSet) of
           true ->
  -            case nksip_parse:uris(UriSet) of
  +            case nksip_parse:ruris(UriSet) of
                   [] -> [[]];
                   UriList -> [UriList]
               end;
  
positive.code: 
  normalize_uriset(_Type, [], Acc1, Acc2) ->
      Acc2++[Acc1].
  
  
  
  
negative.code:     [[nksip:uri()]].
  
  normalize_uriset(#uri{}=Uri) ->
      [[ruri(Uri)]];
  
  normalize_uriset(UriSet) when is_binary(UriSet) ->
      case nksip_parse:ruris(UriSet) of
          [] -> [[]];
          UriList -> [UriList]
      end;
  