Make nd6_gctimer tunable.

MFC after:	1 week
With the move away from GNATS, drop the CTM config file for downloading
the GNATS database, it will be going away soon.
mdoc: remove superfluous paragraph macros.
Provide APIs to directly get 'lowmem' and 'highmem' size directly.

Previously the sizes were inferred indirectly based on the size of the mappings
at 0 and 4GB respectively. This works fine as long as size of the allocation is
identical to the size of the mapping in the guest's address space. However, if
the mapping is disjoint then this assumption falls apart (e.g., due to the
legacy BIOS hole between 640KB and 1MB).
Fix ifname normalization.  ifconfig_IF_alias{es,N} did not work if ifname has
any of [.-/+].

Spotted by:	jhay
Make cpuctl_do_cpuid() and cpuctl_do_cpuid_count() return void.
There is no error to report.

Requested by:	attilio
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Put the aesni_cipher_setup() and aesni_cipher_process() functions into
the file which is compiled with SSE disabled.  The functions set up
the FPU context for kernel, and compiler optimizations which could
lead to use of XMM registers before the fpu_kern_enter(9) is called or
after fpu_kern_leave(9), panic the machine.

Discussed with:	jmg
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Add missing linefeed.
sysctl subsystem uses sxlocks so avoid to setup dynamic sysctl nodes
before sleepinit() has been fully executed in the SLEEPQUEUE_PROFILING
case.

Sponsored by:	EMC / Isilon storage division
Remove fixed path as part of suggestion. Three dots are fine for most
uses. Add a note about a correct workaround.
Use existing PHOLD() and PRELE() macros.

Submitted by:	kib @
Document r267639 CTL ABI breakage.
Fix multiple vulnerabilities in file(1) and libmagic(3).

Security:	FreeBSD-SA-14:16.file
Approved by:	so
Fix issues in config parser relating to lun serial numbers.

Without this fix some serial numbers needed to be quoted
to avoid the config parser bailing out.

Submitted by:	delphij
Sponsored by:	iXsystems
Clarify the expected usage of I2C 7-bit slave addresses on ioctl(2)
interface.

While here add the cross reference to iic(4) on iicbus(4).

CR:		D210
Suggested by:	jmg
MFC after:	1 week
Correct memset size.

Submitted by:	Sascha Wildner (swildner at dragonflybsd dot org)
Reviewed by:	Kashyap Desai <kashyap.desai avagotech.com>
MFC after:	2 weeks
Apply vendor fixes for big endian support and 20GBps/25GBps link speeds.

Many thanks to Emulex for their continued support of FreeBSD!

Submitted by:	Venkata Duvvuru <VenkatKumar.Duvvuru Emulex.Com>
MFC after:	3 days
Catch up with many years of changes:

o Document PF_LOCAL as being an alias for PF_UNIX
o Document POSIX standardization of this interface using AF_*
  constants rather than PF_* constants, and note the three particular
  families which POSIX standardizes.
o Note anticipated POSIX standardization of SOCK_CLOEXEC.
o Delete from listing protocol families that FreeBSD doesn't support
  (in some cases, like PF_PUP, has never supported).
o Add to listing some current protocol families that have been
  introduced in the last decade or so.
o Document the correspondence of PF_* and AF_* constants.

We should probably change the documentation to make the AF_* constants
primary, but this commit does not do so.

Reviewed by:	kevlo@
MFC after:	1 month
Unbreak installation of the rtld tests.

X-MFC-With:	r267679
Make sure that the sub-makes for unwind.h start from the CURDIR
(/usr/src) tree rather than the OBJDIR (/usr/obj) tree. This fixes
broken incremental builds with the canonical MAKESYSPATH workaround
of .../share/mk. This is a gross kludge.