cpt - connect proxy tunnel
==========================
(c) 2008 marco (@macarony.de - Matthias Diener)

WHAT IS
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cpt is a tranparent connect proxy tunnel.
It is a counter part for e.g. proxytunnel:
http://proxytunnel.sourceforge.net/intro.php

Apache has a module "mod_proxy" that allows you to open a connecttion through the webserver to another port.
(Dag Wieers has a good HOWTO for Apache and proxytunnel: http://dag.wieers.com/howto/ssh-http-tunneling/)
Other Webserver like lighttpd, nginx, .. don't have such an impementation. I wrote cpt to add this feature.
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 misbuild requests.  They go straight forward to the
default server. A request that doesn't pass the conditions is passed forward too, the webserver will handle it
(with the default error page). There will be no awareness that cpt is running as proxy.
cpt is build to be secure, but you can disable all checks, which is a security leak and therefore not! recommended.
Configuration is done by editing "cpt_conf.h" - see there for more information. So there is (hopefully) no way to
manipulate the binary file and change any restriction. There is a little disadvantage by this.. you have to compile
cpt every time by yourself. There will be no binary, because there is no sense in having a standard option set..

HINT
====
If "cpt_conf.h" doesn't exist "make" will copy (and use) "cpt_conf.def.h"
This is to prevent the personal "cpt_conf.h" to get overwritten by the next release.
You have to edit "cpt_conf.h" before you build cpt and remove this line:
#define _REMOVE_THIS_LINE_BEFORE_BUILD_