0: No output. Default for mount_mfs unless -N specified
1: Output size of partition and cylinder groups.
2: Follow with a progress-bar line of dots (scaled to finish at RH margin)
3: Include a single line of alternate suberblock addresses before progress
bar. Default for newfs.
4: Output lots of lines of alternate superblock numbers that scroll madly
up the screen.
If -N given, newfs/mount_mfs exits before displaying any progress bar.
Output constrained (almost always) to 1 column less than the terminal width.
Correct calculation of number of inodes from density for small filesystems.
Add a '-n inodes' option so that the desired number of inodes can be
explicitly given - init needs this for mfs /dev, -i density is too crude.
on the command line with the -u, -g and -p options respectively.
The old malloc() replacement (and related functions) didn't work with
the libc get{pw,gr}nam() functions so it was removed and a separate
memory allocation function added that is only called to allocate the
space for the MFS file system.
Also use a table for the usage flags instead of multiple fprintf()'s
with "if (mfs)" checks sprinkled through.
wiz