Things to do for v3:

 -> A better way to set options up: there are a lot of globals out there
 ATM.
 -> Names for clients, rather than IP addresses: it's Difficult(tm) to
 figure out which addresses we can proxy, so we'll have to use names. The
 current bodge isn't good enough.
 -> Proper paranoid DNS checking.
 -> Client-side name resolution for people behind firewalls ?
 -> Accounting.
 -> More compact encapsulation. 
 -> Proper end-to-end delays, rather than additive delays.
 -> MD5 stuff for cookies.
 -> Kick clients who just connect to the server and sit there.
 
