Bug#568292: auto-install: pulls netcfg into images that should not have it
auto-install is included in most types of images and for some reason
depends on netcfg. But for example cdrom and hd-media images don't include
any network driver kernel modules, so the network is completely unusable.
In those cases netcfg (plus ethdetect) only serves to bloat the image.
The package should be reworked so that it works together with netcfg if it
is included in the initrd, but should also work correctly when netcfg gets
installed later by anna.
The dependency on netcfg should then be dropped.