	TODO - 2004-10-11
	~~~~~~~~~~~~~~~~~
 *	Send 'Echo-Requests' to connected clients at reglar intervals and
	disconnect those that do not reply.
 *	Interrupting/killing PPTProx should send Call-Disconnect-Notify
	and Stop-Control-Connection-Requests to the server and all clients.
 *	Comment the source
 *	Better documentation


	ENHANCEMENTS
	~~~~~~~~~~~~
 *	Put gre packet handling in a seperate thread?
 *	Access control?
