anchor.diff:  -spec accept(ListenSocket) -> {ok, Socket} | {error, Reason} when
         ListenSocket :: socket(),
         Socket :: socket(),
  -      Reason :: closed | timeout | system_limit | inet:posix().
  +      Reason :: closed | system_limit | inet:posix().
   
   accept(S) ->
       case inet_db:lookup_socket(S) of
  
positive.code:       Options :: [connect_option()],
        Timeout :: timeout(),
        Socket :: socket(),
        Reason :: inet:posix().
  
  connect(Address, Port, Opts, Time) ->
      Timer = inet:start_timer(Time),
  
negative.code:       Length :: non_neg_integer(),
        Timeout :: timeout(),
        Packet :: string() | binary() | HttpPacket,
        Reason :: closed | timeout | inet:posix(),
        HttpPacket :: term().
  
  recv(S, Length, Time) when is_port(S) ->
  