[Users] problems creating vz cache

[Samuel Vogel]

Maybe I souldn't always post here before relying on a little trial & 
error ;) But on the other hand, my experiences might be useful to other 
new users, starting from scratch like me.

A simple "touch /var/cache/pkg-cacher/exlock" did also fix this problem.

Right now it's downloading the packages, so everything seems to work!

I think it would be a good idea to fix these to issues in the debian 
packages:
1. Make procmail a dependency.
2. Create /var/cache/pkg-cacher/exlock.

This would probably save others some time.

Regards,
Samy