cookie authentication

[Ge van Geldorp]

> From: Robert Hogan
> 
> this seems to be implemented a bit oddly. the controller has 
> to send the raw bytes rather than hexified version to authenticate. 

It only has to send the raw bytes when it's using the old, deprecated, V0
control protocol. The current V1 protocol expects a hexified cookie.
Note that arma recently fixed a bug in cookie authentication
(src/or/control.c revision 1.192, dated 2006-05-24). Without that bugfix
cookie authentication doesn't work at all.

Ge van Geldorp.