/dev/rfoo0d.
Scan a list of devices instead of insisting on all the world
being wd0.
Allow for disk names to be specified (e.g. `sd0') instead of full
path names only.
Sync the man page with the reality.
device driver cannot supply a label (real or faked). This allows
you to practice using fdisk on disposable media (e.g., "dd count=1
<dev/zero >/tmp/junk; fdisk /tmp/junk", "dd count=1 </etc/passwd
>/tmp/fix-up-the-mess; fdisk /tmp/fix-up-the-mess") and allows me
to test DOSpartitioning and labelling on floppies.