Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

pkgbase: Create a FreeBSD-mtree package

And put the mtree binary and files in it.
Useful to create small mfsroot using /etc/rc.d/var without
having to install FreeBSD-utilities.

MFC after: 2 weeks
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D33442

Allow bootstrapping mtree on Linux systems

Linux glibc has a dummy lchmod that always fails and emitting a linker
warning when used. Don't fail the build due to that warning when
bootstrapping by setting LD_FATAL_WARNINGS=no.

Reviewed By: brooks, emaste
Differential Revision: https://reviews.freebsd.org/D25930

Add HAS_TESTS to all Makefiles that are currently using the
`SUBDIR.${MK_TESTS}+= tests` idiom.

This is a follow up to r321912.

Convert traditional ${MK_TESTS} conditional idiom for including test
directories to SUBDIR.${MK_TESTS} idiom

This is being done to pave the way for future work (and homogenity) in
^/projects/make-check-sandbox .

No functional change intended.

MFC after: 1 weeks

usr.sbin: normalize paths using SRCTOP-relative paths or :H when possible

This simplifies make logic/output

MFC after: 1 month
Sponsored by: Dell EMC Isilon

Convert usr.sbin to LIBADD
Reduce overlinking

Fix the fix

Fix build.

Integrate usr.sbin/nmtree/tests from NetBSD into atf/kyua

In collaboration with: pho
Sponsored by: EMC / Isilon Storage Division

Add LIBMD and LIBUTIL to DPADD to fix "make checkdpadd"

Approved by: jmmv (mentor)
MFC after: 5 days
Phabric: D633
PR: 192763

Revert r267233 for now. PIE support needs to be reworked.

1. 50+% of NO_PIE use is fixed by adding -fPIC to INTERNALLIB and other
build-only utility libraries.
2. Another 40% is fixed by generating _pic.a variants of various libraries.
3. Some of the NO_PIE use is a bit absurd as it is disabling PIE (and ASLR)
where it never would work anyhow, such as csu or loader. This suggests
there may be better ways of adding support to the tree. Many of these
cases can be fixed such that -fPIE will work but there is really no
reason to have it in those cases.
4. Some of the uses are working around hacks done to some Makefiles that are
really building libraries but have been using bsd.prog.mk because the code
is cleaner. Had they been using bsd.lib.mk then NO_PIE would not have
been needed.

We likely do want to enable PIE by default (opt-out) for non-tree consumers
(such as ports). For in-tree though we probably want to only enable PIE
(opt-in) for common attack targets such as remote service daemons and setuid
utilities. This is also a great performance compromise since ASLR is expected
to reduce performance. As such it does not make sense to enable it in all
utilities such as ls(1) that have little benefit to having it enabled.

Reported by: kib

In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE.

This is currently an opt-in build flag. Once ASLR support is ready and stable
it should changed to opt-out and be enabled by default along with ASLR.

Each application Makefile uses opt-out to ensure that ASLR will be enabled by
default in new directories when the system is compiled with PIE/ASLR. [2]

Mark known build failures as NO_PIE for now.

The only known runtime failure was rtld.

[1] http://www.bsdcan.org/2014/schedule/events/452.en.html
Submitted by: Shawn Webb <lattera@gmail.com>
Discussed between: des@ and Shawn Webb [2]

Merge from CheriBSD:
commit 70b8f0c127db6b80411789d237b403cc64a93573
Author: Brooks Davis <brooks@one-eyed-alien.net>
Date: Mon Jan 27 22:53:57 2014 +0000

Move mtree.5 to usr.sbin/nmtree.
Remove note that mtree 2.0 format files aren't supported.

MFC after: 4 weeks
Sponsored by: DARPA, AFRL

Merge from CheriBSD:
commit 6b569451b92c48ccf1768da32e7e89189e1aa253
Author: Brooks Davis <brooks@one-eyed-alien.net>
Date: Mon Jan 27 22:50:46 2014 +0000

Always install nmtree as mtree.
For compability, link mtree to nmtree.

X-MFC after: never
Sponsored by: DARPA, AFRL

Always install our mtree as /usr/sbin/fmtree and link it as
/usr/sbin/mtree by default.

Add a src.conf option WITH_NMTREE that causes NetBSD's mtree to be linked
as /usr/sbin/mtree as well as /usr/sbin/nmtree.

Add the missing '$' from the LIBNETBSD variable