anchor.diff:  	    {reply, {error, "Could not link to pid"}, State, ?TIMEOUT}
       end;
   
  -handle_call({quit}, From, State) ->
  +handle_call({quit}, _From, State) ->
       {stop, "Asked to quit", State}.
   
   
  
positive.code: 	    {noreply, State, ?TIMEOUT};
  	{error, E} ->
  	    {reply, {error, E}, State, ?TIMEOUT};
  	SipSocket when record(SipSocket, sipsocket) ->
  	    logger:log(debug, "Sipsocket TCP: Use existing connection to ~s:~p", [Host, Port]),
  	    {reply, {ok, SipSocket}, State, ?TIMEOUT}
      end;
  
negative.code: 
  start_listeners([], SocketList) ->
      SocketList;
  start_listeners([{Proto, Port} | T], SocketList) when is_atom(Proto), is_integer(Port), Proto == tcp6; Proto == tls6 ->
      case sipserver:get_env(enable_v6, false) of
  	true ->
  	    NewSocketList = case catch tcp_listener:start(Proto, Port) of
  