Update the autofs(5) manual to reflect it first appeared in
FreeBSD 10.1-RELEASE.

Submitted by:	dhw
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Import a hackish tool I use to examine the skew of the TSC across
CPUs in a system.  The tool queries the kernel for its set of CPUs
and compares TSC values on each of the additional CPUs to the first
CPU in turn.  It then outputs a table of simple statistics.
Use sh -c '...' to launch the dtb build scripts with env stuff prepended,
otherwise it tries to treat the env var stuff as a script file name.
Fixes and enhancements for the if_cgem driver...

- miibus fixes as suggested by Yonghyeon Pyun.
- enable VLAN MTU support.
- fix a few WITNESS complaints in cgem_attach().
- have cgem_attach() properly init the ifnet struct before calling
  mii_attach() to fix panic when using e1000phy.
- fix ethernet address changing.
- fix transmit queue overflow handling.
- tweak receive queue handling to reduce receive overflows.
- bring out MAC statistic counters to sysctls.
- add e1000phy to config file.
- implement receive hang work-around described in reference guide.
- change device name from if_cgem to cgem to be consistent with other
  interfaces.

Submitted by:	Thomas Skibo <ThomasSkibo@sbcglobal.net>
Reviewed by:	wkoszek, Yonghyeon PYUN <pyunyh@gmail.com>
Avoid ./ in zoneinfo entries in METALOG

Use of "find ." resulted in METALOG entries with an extra ./ -- e.g.,
./usr/share/zoneinfo/./America/Toronto.  Avoid this by using globbing
via "find *" instead.

Reviewed by:	brooks
Sponsored by:	DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D719
Always seek back to the beginning of a regular directory, even if the
previous seek location was 0.  Without this, readdir() would see
dd_loc of zero and call getdirentries() which would start reading
entries at the current seek location of the directory ignoring the
first batch of entries.  Also, rewinddir() should always seek so that
it reads the directory from the beginning to get updated entries.

PR:		192935
Reported by:	iron@mail.ua
MFC after:	3 days
Note that script(1) consumes filemon(4).
Remove DIAGNOSTIC from the kernel config of low-end arm systems.  Sanity
checks such as vmem_check() can make a low-end system go completely
unresponsive for as much as 3 seconds out of every 10.
Actually save and restore FPU state on APs during suspend and resume.

Committed from:	Atom-based HP netbook after resuming in X
When built with FDT support, add /boot/dtb to the list of search directories.
Add a function to get the frequency of the AHB bus.  Another stopgap
function until we have full clock support for imx6.
Create a /boot/dtb directory to house DTB blobs. The flattened device
tree support includes a device tree source compiler dtc(8) which
converts .dts files into .dtb files. /boot/loader will load dtb files
from this directory by default, allowing for fewer differences between
images for different SoCs. Compiled dts files will wind up here
eventually as an alternative to embedding them into the kernel.
Document this in hier(7), as well as add missing entries for
/boot/firmware and /boot/zfs, though the latter two should only be
considered place holders if someone wants to make them better.
Merge remote-tracking branch 'freebsd/master' into hardened/current/segvguard