support for PCMCIA network cards

explore using busybox

use bootparam root= and respond appropriately (i.e mount NFS or CDROM)

set ROOT and MODULES in /etc/mkinitrd.conf using debconf?

when using MODULES=dep, put all modules into /etc/mkinitrd/modules,
and move aside the /loadmodules file in the initrd as part of a script
