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
Merge remote-tracking branch 'freebsd/master' into hardened/current/aslr