anchor.diff:                          ?P("[server] await continue"),
                           receive
                               {Master, continue} ->
  -                                ?P("[server] continue"),
  +                                ?P("[server] received continue"),
                                   busy_send_srv(L, Master, Msg)
                           end;
                       {error, Reason} ->
  
positive.code:         fun() ->
                  ?P("[server] create listen socket"),
                  case ?LISTEN(Config, 0, [{active,false},binary,
                                          {reuseaddr,true},{packet,0}]) of
                      {ok, L} ->
                          ?P("[server] listen socket created"),
                          {ok, Port} = inet:port(L),
  
negative.code:             ?P("[master] send timeout: server send queue full (N = ~w+1)", [N]),
              %% Send queue full, sender blocked 
              %% -> stop sender and release client
              Server ! {self(), close},
              Client ! {self(), recv, N+1},
              ?P("[master] await server 'send'..."),
              receive
                  {Server, send} ->
                      busy_send_2(Server, Client, N+1)
              after 10000 ->
                      %% If this happens, see busy_send_srv
                      ?P("[master] UNEXPECTED: server send timeout"),
                      ct:fail({timeout,{server,not_send,flush([])}})
              end
      end.
  