re-removes the printing of size for non-regular files, supports
type-less root (.) entries as seen in a couple ports, and corrects a bug
in -N that caused expanded Subversion $FreeBSD$ strings in comments to
be processed as /etc/group entries.
Includes one trivial portability fix (including <stdint.h> in three
files) that has been submitted upstream but not yet committed.
MFC after: 3 days
towards replacing our mtree.
Sponsored by: DARPA, AFRL
Thanks to: cristos@NetBSD for reviewing and committing my patches
wiz@NetBSD for fixing typos in my patches
