- Refer vnode disk as vnd0 instaed of vnd0c.
- Rename argument to specify vnode disk from special_file to vnode_disk.
- Explain that vnode_disk is a special file or name like vnd0.
- Add one example which uses vnd0 instead of /dev/vnd0c.
- Add optional "geomspec" argument as third argument when configuring
a vnode disk. Format is: secsize/secpertrack/trackpercyl/ncylinders,
e.g. 512/18/2/80.
- Add optional "-t typename" argument, mutually exclusive with "geomspec",
that will look up "typename" in /etc/disktab and use the geometry
specified in the entry.
- Update verbose output accordingly.
