socks_connection, and inherits channel_forward.
(class socks_continuation): Deleted.
(do_socks_continuation, make_socks_continuation): Deleted.
(class socks_exception_handler): Deleted.
(do_exc_socks_handler, make_socks_exception_handler): Deleted.
(do_socks_channel_event): New function, in particular handling
CHANNEL_EVENT_CONFIRM and CHANNEL_EVENT_DENY.

Rev: src/socks.c:1.5.2.5