- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r258437:

Sync with NetBSD. The functional change is to make the output when
comparing a directory to an mtree file more compatible with fmtree when
FreeBSD 9 compatiblity mode is on. This output is clearly intended for
humans not computers, but some tools such as mergemaster's -U option rely
on it.

Approved by: re (glebius)

MFC r256687:

Upgrade to the latest version of mtree from NetBSD. This revision
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 committed upstream.

Approved by: re (glebius)

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Import a new version of NetBSD's mtree.

This version of mtree implements a new flag (-O) that can be used to
restrict the tool to certain pathnames. Also, it fixes a compiler
warning generated by -Wmissing-variable-declarations.

Acked by: brooks

Add NetBSD's mtree to the tree and install it as nmtree as the first step
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

Vendor import of NetBSD's mtree at 2012-12-21