using DEFINE_COMMAND2.
(open_direct_tcpip): Likewise.
(remote_listen_command): Likewise.
(make_request_tcpip_forward_command): Deleted function. Moved code
to remote_listen_command.
(make_direct_tcpip_handler): Redefined using DEFINE_COMMAND.
(make_tcpip_forward_handler): Likewise.

Rev: src/tcpforward_commands.c:1.30