This ensures that they can be installed by finish-install.d/08hw-detect
when virtualization is detected. Otherwise the lack of network breaks
this step.
We move the default preseed to the kali profile so that the default
preseed can actually again enable simple-cdd-profiles that we need
because we want the other profiles to have their preseed and postinst
working (and they work through the script run when simple-cdd-profiles
is installed).
We add an offline profile that disables the network mirror (but not
the networking!) and we add a "postinst" script that is run in the
finish-install step to actually configure /etc/apt/sources.list that
is empty due to the preseed.
Raphaël Hertzog