MFC r264420:

  Always install pkg.conf. Don't depend on MK_PKGBOOTSTRAP.
MFC r264354

Fix insta-panic on assert of unlocked periph mtx in ciss(4) when
logical volume state changes.

Sponsored by:	Yahoo! Inc.
MFC r263846: sh: Fix memory leak when trying to set a read only variable.
MFC r263847: sh: Fix memory leak with an assignment before a regular builtin
MFC r264295:
Remove support of LUN-based CD changers from cd(4) driver.

This code was heavily broken few months ago during CAM locking changes.
Fixing it would require almost complete rewrite.  Since there are no
known devices on market using this interface younger then ~15 years, and
they are CD, not even DVD, I don't see much reason to rewrite it.

This change does not mean those devices won't work.  They will just work
slower due to inefficient disks load/unload schedule if several LUNs
accessed same time.
MFC r264307:
Fix three refcounter leaks and lock recursion they covered.
MFC r264311 (by smh):
Fix build breakage caused by r264295
MFC r263690

change defaule permissions on /dev/devstat. while i'm here remove
D_NEEDGIANT flag

Submitted by:	jhb
Reviewed by:	jhb, scottl, rwatson, delphij, phk
MFC several WITH_TESTS-related documentation fixes.

- r258014 Document WITH_TESTS src.conf(5) option.
- r263089 Fix description of WITHOUT_BMAKE's purpose.
- r264408 Fix test suite name in src.conf(5).
- r264410 Document how to install the test suite.
- r264412 Add FreeBSD 10.1 to the list of recognized releases for Fx.
- r264413 Miscellaneous fixes to tests(7).
MFC r264059+264067:

Implement GNU's extension of 'status' operand.  The GNU syntax is
borrowed where syntax status=noxfer means no transfer statistics
and status=none means no status information at all.

This feature is useful because the statistics information can
sometimes be annoying, and redirecting stderr to /dev/null would
mean error messages also gets silenced.

Obtained from:	OpenBSD
MFC: r264315, r264316

Fix Xref order in SEE ALSO.
MFC: r264453

Correct geli parameter.

PR:		188582
Submitted by:	Michael Hall