seem contrary to the documentation in RFC 1013.
(do_client_channel_x11_receive): Print received cookie, for
debugging purposes.
(make_forward_x11): Print generated fake cookie, for debugging
purposes.
(parse_display): Fixed ssh_format invocation creating the local
socket name.
(do_channel_open_x11): Fixed invocation of verbose().
(do_format_request_x11_forward): Get the connection from the
channel, now that the connection pointer is available there.
(do_format_request_x11_forward): Hex encode the cookie. That's
ugly, but needed for compatibility.

Rev: src/client_x11.c:1.7