MFC r246860:

Fix undefined behaviour in usr.bin/mail/util.c.

Reported by:	deeptech71@gmail.com
MFC r246873:

In contrib/opie/opiekey.c, use the correct length to zero the secret.

Found by:	clang ToT
Reviewed by:	delphij
MFC r246874:

Fix two instances of undefined behaviour in contrib/nvi.

Found by:	clang ToT
Obtained from:	NetBSD
Reviewed by:	jh
MFC r246875:

Import change 40eebf235370b6fe6353784ccf01ab92eed062a5 from upstream wpa:

  From: Jouni Malinen <j@w1.fi>
  Date: Fri, 15 Jul 2011 13:42:06 +0300
  Subject: [PATCH] MD5: Fix clearing of temporary stack memory to use correct length

  sizeof of the structure instead of the pointer was supposed to be used
  here. Fix this to clear the full structure at the end of MD5Final().

Found by:	clang ToT
Reviewed by:	rpaulo
MFC r239672 (by rrs):
  This small change takes care of a race condition
  that can occur when both sides close at the same time.
  If that occurs, without this fix the connection enters
  FIN1 on both sides and they will forever send FIN|ACK at
  each other until the connection times out. This is because
  we stopped processing the FIN|ACK and thus did not advance
  the sequence and so never ACK'd each others FIN. This
  fix adjusts it so we *do* process the FIN properly and
  the race goes away ;-)

Approved by:	rrs
Approved by:	emaste (co-mentor)
MFC: Merge sendmail 8.14.6 errata issue
MFH r247014, r247050 and r247051.

Add a sample program that shows how a custom comparison function and
qsort(3) can work together to sort an array of integers.

PR:             docs/176197
Submitted by:   Fernando, fapesteguia at opensistemas.com
		Christoph Mallon, christoph.mallon at gmx.de
Approved by:    gjb (mentor), remko (mentor)
MFC r247334:

Correct a typo introduced in r153575, which gives inverted logic when
handling blocking semantics when seeding.

PR:		kern/143298
Submitted by:	James Juran <james juran baesystems com>
Reviewed by:	markm
MFC: r247632

- Complete r231621 (MFC'ed to stable/7 in r232094) by also blacklisting the
  bridge used by VMware for PCIe devices. While at it, update the comment
  now that we know that MSI-X doesn't work with ESXi 5.1 for Intel 82576
  either and the underlying issue is a bug in the MSI-X allocation code of
  the hypervisor.
  Reported by: Harald Schmalzbauer
- Make the nomatch table const.
MFC r247906:

The hashmask returned by hashinit() is a valid index in the returned hash array.
Fix a siftr(4) potential memory leak and INVARIANTS triggered kernel panic in
hashdestroy() by ensuring the last array index in the flow counter hash table is
flushed of entries.
Merge of current of tzdata2013b

Lots of historical data added.

Morocco: add DST rules for the coming years
Cuba: Doing DST in 2013.
Chili: Will do DST in 2013 as it seems