FreeBSD_HEAD_amd64_gcc4.9 - Build #672 - Fixed

FreeBSD_HEAD_amd64_gcc4.9 - Build #672 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_amd64_gcc4.9/672/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_amd64_gcc4.9/672/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_amd64_gcc4.9/672/console

Change summaries:

289435 by bdrewery:
Fix adding manpages installed by LOCAL_DIRS to whatis file.

The ordering of 'etc' in the install has a long history dating back to the
first time it was realized it needed to be "last" in r4486.  That commit
still left it before LOCAL_DIRS though.  By having it before LOCAL_DIRS
any manpages they install were not being added to the whatis database in the
install image.  They would likely show up in the file after a periodic
rebuild of the file though.

Currently the whatis file is built by an 'afterinstall' hook in etc/Makefile
that calls share/man's 'makedb' target.

MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division

289434 by bdrewery:
Remove lockf as an ITOOL.

It was added in r152006 to handle serializing access of info/dir when
installing INFO files.  We no longer support INFO files since r276551
though.

Sponsored by:	EMC / Isilon Storage Division

289433 by bdrewery:
Correct a bitrotted comment about installworld order requirements.

The case of make(1) using a new /bin/sh issue was fixed in r173219 when ITOOLS
was introduced.

There are still issues with mid-install errors leaving a system unusable that
are currently non-trivial to solve.  The safest ordering requires installing
rtld, libc and libthr (in that order) before anything else.  We don't do that
now though.  Much improvement is needed here still.

Discussed with:	kip and kan (rtld/library ordering)
MFC after:	1 week
Sponsored by:	EMC / Isilon Storage Division

289432 by bdrewery:
Tweak the guard more to suggest 'all' if SUBDIR_OVERRIDE is specified.  In that
case 'all' does make sense.

MFC after:	2 weeks
X-MFC-With:	r289411
Sponsored by:	EMC / Isilon Storage Division

289430 by bdrewery:
Remove .MAKE from targets that do more than just run sub-makes, such as
calling rm or mtree.

MFC after:	1 week
Sponsored by:	EMC / Isilon Storage Division

289429 by scottl:
Revert an extra hunk that crept into the last commit.

Submitted by:	emax
Obtained from:	Netflix, Inc.
MFC after:	3 days