anchor.diff:      %% or address of some form.
       case sipurl:parse(Address) of
   	URL when is_record(URL, sipurl) ->
  -	    case get_usernames_for_url(URL, fetch_addresses(), []) of
  -		error ->
  -		    [];
  -		R when is_list(R) ->
  -		    R
  -	    end;
  +	    get_usernames_for_url(URL, fetch_addresses(), []);
   	_ ->
   	    %% unparseable URL
   	    []
  
positive.code:     case sipurl:url_is_equal(URL, H#address.url) of
  	true ->
  	    get_usernames_for_url(URL, T, [H#address.user | Res]);
  	_ ->
  	    %% URL does NOT match this address record, try next (T)
  	    get_usernames_for_url(URL, T, Res)
      end.
  
negative.code: %%           usernames for the matching address records, fetched from
  %%	     the persistent sipuserdb_file process, that matches using
  %%           URI address matching rules.
  %% Returns : Users = list() of string()
  %%--------------------------------------------------------------------
  get_usernames_for_url(_URL, [], Res) ->
      %% Make list sorted and remove duplicates
  