Unfortunately, there isn't one.  Yet.

This program is mostly intended for technically oriented users.
They should know what to do.

See also
	http://metalab.unc.edu/LDP/HOWTO/mini/Firewall-Piercing.html
which is a good introduction to firewall piercing.  It also has
describes one way to use httptunnel.

Note to people willing to help out with the manual: I'd like the
manual to be partially generated from the source code.  Both texinfo
and nroff code should be generated from usage() or parse_arguments()
in htc.c and hts.c.
