Bug#703404: update

[Tycho Lürsen <tycholursen@gmail.com>]

I finaly have a working system, but I had to switch mirrors twice during 
installation.
After the reboot, I still could not use my system. I had to remove 
"debian-archive-keyring" (witch is not allowed unless you force it to) 
and replace it with the proper one, reinstall apt, etc.