Avoid unlocking unlocked mutex in RCTL jail code.  Specific test case
is attached to PR.

PR:		193457
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Fix ctld(8) to not forget to send TargetPortalGroupTag and TargetAlias
when the initiator skips security negotiation.  This fixes interoperability
with Xtend SAN initiator.

PR:		193021
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Use keys_add_int() where appropriate.  No functional changes.

Sponsored by:	The FreeBSD Foundation
Don't cross mount boundaries when cleaning tmp files.

Mounting something in /tmp such as a build jail with nullfs mounts for
some directories can result in very surprising results the next day.

MFC after:	2 weeks
Relnotes:	yes
Whitespace nit.

MFC after:	1 week
Change how the recommended mailing list to track is
added to the footer of the release/doc/ pages by
moving a hard-coded value (that is subject to human
error to change) to release.ent where other values
are regularly changed, and adding parsing logic to
release.xsl.

Approved by:	re (implicit)
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Add an arch.powerpc64 entity.

Sponsored by:	The FreeBSD Foundation
Expand the tests structure in test_small(..) to workaround the
"initializer not constant" warning with gcc

Approved by: jmmv (mentor)
MFC after: 3 days
Phabric: D744
Sponsored by: EMC / Isilon Storage Division
Allow vtnet operation without merged rx buffers.

NetBSD's virtio-net implementation doesn't negotiate
the merged rx-buffers feature. To support this, check
to see if the feature was negotiated, and then adjust
the operation of the receive path accordingly by using
a larger iovec, and a smaller rx header.
In addition, ignore writes to the (read-only) status byte.

Tested with NetBSD/amd64 5.2.2, 6.1.4 and 7-beta.

Reviewed by:	neel, tychon
Phabric:	D745
MFC after:	3 days
Bump __FreeBSD_version after SA-14:18

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Add diagnostic printfs and disable test # 4 on i386

Reviewed by: jmmv, rpaulo
MFC after: 3 days
Phabric: D749
PR: 191676
Sponsored by: EMC / Isilon Storage Division
Fix issue with nmdm and leading zeros in device name.

The nmdm code enforces a number between the 'nmdm' and 'A|B' portions
of the device name. This is then used as a unit number, and sprintf'd
back into the tty name. If leading zeros were used in the name,
the created device name is different than the string used for the
clone-open (e.g. /dev/nmdm0001A will result in /dev/nmdm1A).

Since unit numbers are no longer required with the updated tty
code, there seems to be no reason to force the string to be a
number. The fix is to allow an arbitrary string between
'nmdm' and 'A|B', within the constraints of devfs names. This allows
all existing user of numeric strings to continue to work, and also
allows more meaningful names to be used, such as bhyve VM names.

Tested on amd64, i386 and ppc64.

Reported by:	Dave Smith
PR:		192281
Reviewed by:	neel, glebius
Phabric:	D729
MFC after:	3 days
Fix a boundary case error in vm_reserv_alloc_contig(): If a reservation
isn't being allocated for the last of the requested pages, because a
reservation won't fit in the gap between allocated pages, then the
reservation structure shouldn't be initialized.

While I'm here, improve the nearby comments.

Reported by:	jeff, pho
MFC after:	1 week
Sponsored by:	EMC / Isilon Storage Division
Fix minor buffer overflow reported by Coverity.

CID:		1006781
Fix memory leak on error, reported by Coverity.

CID:		1007773
Fix couple off-by-one range check errors, reported by Coverity.

CID:		1007837
Fix array overrun, reported by Coverity.

CID:		1229970
Remove uninitialized and unused variable, reported by Coverity.

CID:		1230015
Make ctl_port_mask an array to support more then 32 ports.

Overflow reported by Coverity.

CID:		1229894
MFC after:	3 days
Remove many false positives with make checkdpadd

- Reduce DPADD and LDADD in checkdpadd to -l<foo>
- Skip over -Wl,[es]*-group because -Wl,--end-group and
  -Wl,--start-group might be required to properly link objects (see
  usr.bin/clang/lldb as an example)

This caveat has been present for a while with some components of
the build. However, these false positives were made more more apparent
after r269648.

Phabric: D635
Reviewed by: jmmv (an earlier version)
PR: 192730
MFC after: 2 weeks