cpt aims to be running in front of any HTTPS
server. It forwards all requests that don't call
for a "CONNECT .." to the normal HTTPS server.
There is no error handling for mistaken requests;
they go straight to the default server. A request
that doesn't pass the conditions is passed
forward too, and the Web server will handle it
(with the default error page). Users should be
unaware that cpt is running as a proxy.
