(do_tcpip_channel_die): Call close_fd() rather than kill_fd().
(tcpip_channel_start_io): Don't call channel_start_receive().
(make_exc_tcpip_connect_handler): New exception handler, which
raises EXC_CHANNEL_OPEN on connect and dns errors.
(do_open_forwarded_tcpip_continuation): Require that channel !=
NULL.
(make_open_forwarded_tcpip_continuation): Removed
exception_handler argument.
(do_channel_open_direct_tcpip): Use a better exception handler.
(do_channel_open_forwarded_tcpip): -"-

Rev: src/tcpforward.c:1.36