Add a hack-ish attempt to provide backwards-compatibility with
release.conf SVNROOT entries that do not have a trailing '/'.

In order to provide a mechanism to use !svn, the trailing '/'
was added to SVNROOT so there were no assumptions being made
about '/' being in the URL between SVNROOT and SRCBRANCH.

Sponsored by:	The FreeBSD Foundation
Stop pw(8) from segfaulting when given certain input

PR:187310
Submitted by:	Kim Shrier
Obtained from:	bug
MFC after:	1 week
Part 2 of bug 187310.. had to commit separately due to local confusion.
Don't let pw crash when give certain input.

PR:		187310
Submitted by:	Kim Shrier
MFC after:	1 week
Fix PR kern/185813 "SOCK_SEQPACKET AF_UNIX sockets with asymmetrical
buffers drop packets".  It was caused by a check for the space available
in a sockbuf, but it was checking the wrong sockbuf.

sys/sys/sockbuf.h
sys/kern/uipc_sockbuf.c
    Add sbappendaddr_nospacecheck_locked(), which is just like
    sbappendaddr_locked but doesn't validate the receiving socket's
    space.  Factor out common code into sbappendaddr_locked_internal().
    We shouldn't simply make sbappendaddr_locked check the space and
    then call sbappendaddr_nospacecheck_locked, because that would cause
    the O(n) function m_length to be called twice.

sys/kern/uipc_usrreq.c
    Use sbappendaddr_nospacecheck_locked for SOCK_SEQPACKET sockets,
    because the receiving sockbuf's size limit is irrelevant.

tests/sys/kern/unix_seqpacket_test.c
    Now that 185813 is fixed, pipe_128k_8k fails intermittently due to
    185812.  Make it fail every time by adding a usleep after starting
    the writer thread and before starting the reader thread in
    test_pipe.  That gives the writer time to fill up its send buffer.
    Also, clear the expected failure message due to 185813.  It actually
    said "185812", but that was a typo.

PR:		kern/185813
Reviewed by:	silence from freebsd-net@ and rwatson@
MFC after:	3 weeks
Sponsored by:	Spectra Logic Corporation
Only use -lpthread for unix_seqpacket_test, not for all test programs.

Reported by:	Garrett Cooper
MFC after:	3 weeks
Sponsored by:	Spectra Logic Corporation
ext2fs: Fix a bug when sorting htree entries.

This a typo introduced when bringing the original code from NetBSD.

Reported by:	Mike Ma
MFC after:	3 days
When calculating the MPU freq, make sure not to overflow by using a uint64_t.

PR:	arm/187223
Submitted by:	Svatopluk Kraus <onwahe@gmail.com>
fts: Don't abort if an empty pathname is given.

Make fts_open(3) treat an empty pathname like any other pathname that cannot
be lstatted because of [ENOENT].

It is rather confusing if  rm -rf file1 "" file2  does not remove file1 and
file2.

PR:		bin/187264
MFC after:	2 weeks
Add option TMPFS to arm/conf/DEFAULTS, remove it from the few configs
that have it individually.  Concensus on freebsd-arm@ is that it should
be included in all ARM kernels.
Slight if reordering to make error branch last.
wlanstats: add help

- add a help (-h) flag
- move usage into itsown function
Open the uart emulation's backing tty in non-blocking mode.
This fixes the issue of bhyve appearing to halt when using
nmdm ports for the console, until a connection is made to
the other end.

bhyveload already does this.

Reported by:	Many.
MFC after:	3 weeks.
Add driver for Port control and interrupts (PORT).

PORT is responsible for external interrupts management,
so move IRQ lines from GPIO driver.
Fix support for increased logical sector size (4K-native drives).

- Logical sector size is measured in words, not bytes.
- If physical sector is not bigger then logical sector, it does not mean
it should be set equal to 512 bytes, but set to logical sector.

PR:		misc/187269
Submitted by:	Ravi Pokala <rpokala@panasas.com>
MFC after:	1 week
libc man pages: Remove reference to non-existent FreeBSD Security
Architecture

MFC After:	3 days
- Export panel info to DTS
- Reset all the layers before setup first one
- Enable display
wlanstats: Add some logic to translate from a vap to its parent device.

This isn't entirely correct (as the device may not necc. be called wlan*) but
this will be further worked into a combined ath, iwn, wlan, etc. tool.

Discussed with:	jhb, adrian
kern/Makefile
	Set WARNS=5 for all files in this directory

kern/unix_seqpacket_test.c
	Fix compiler warnings.  Most were benign, but rcvbuf_oversized
	wasn't working as intended because I forgot to set the buffer sizes.

MFC after:	2 weeks
Reported by:	pho
Sponsored by:	Spectra Logic Corporation
Allow dispatched reswords to carry arguments. Fix a comment while here.
Add missing local declaration.