* Use debian-archive-keyring-udeb
* Add disk labels to non-i386 floppys.
* The busybox in the bootfloppy can be linked with uclibc and/or statically
  to make it smaller. Only init uses it, so it doesn't really matter. This
  could save up to 200k on the boot floppy. But first someone needs to add
  code to install uclibc or a uclibc udeb.
* The apt download fails if the dpkg status file of the build system is
  in an inconsistent state. It could be overridden to use another status
  file, but that file would have to claim that all dependencies of the
  udebs it's downloading were met. Hmm.
* Change mklibs to not pull in libraries from the build system, and only
  act on libraries in the tree; those libraries would then be provided by
  udebs; this would be cleaner in several ways (and it's why e.g. anna
  depends on libc-udeb already).
* Convert the driver floppies to use FAT filesystem, not ext2, on i386.
  Makes it easier for third parties to throw additional udebs on.
* Cache the upxed kernel, to avoid re-upxing it over and over.