This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
refer the reader to the detailed information in section 5,
remove the mount_* man pages for those file system. mount_std(8)
to cover all of the file systems it is currently being used
to mount.
mount_{devfs, fdesc, kernfs, procfs}.8 are now
MLINKS to mount_std.
mount_* programs. While we're at it, collapse the four now-identical
mount programs for devfs, fdesc, kernfs, and procfs into links to
a new mount_std(8) which can mount any really generic filesystem
such as these when called with the appropriate argv[0].
Also, convert the mount programs to use sysexits.h.
