Warn about filesystem-based attacks.
Revert 240527:
	mntbuf can poit to memory allocated by getmntinfo(3) which can't be freed

PR:		bin/171634
Approved by:	cperciva (implicit)
Optimise i387 trigonometric functions. Replace "andw 0x400,%ax \ jnz" with
"sahf \ jp", "fprem1" with "fprem" and "fstsw %ax" with "fnstsw %ax".
remove some unnecessary debugging statements, dead code and incorrect
comment...

Reviewed by:	gnn, imp
fix the kernel files to match our standard "option<space><tab>" format
such that when commenting/uncommentting lines, horizontal spacing is
maintained...

Also fix some minor comment formatting to line things up, etc...

Reviewed by:	gnn, imp
MFC after:	1 week
Remove trailing whitespace.
Fix a crash bug introduced in the iterate node work recently done.

When resuming, the first VAP is checked for max_aid; however if there
is no VAP, this results in a NULL pointer dereference and kernel
panic.
Remove references to userstat(1) and jailstat(1).  Those tools were never
merged from the Perforce branch.  They might be brought in when %CPU limits
go into the tree.

PR:		docs/171240
MFC after:	2 weeks
Improve performance of the Sample rate algorithm on 802.11n networks.

* Don't treat high percentage failures as "sucessive failures" - high
  MCS rates are very picky and will quite happily "fade" from low
  to high failure % and back again within a few seconds.  If they really
  don't work, the aggregate will just plain fail.

* Only sample MCS rates +/- 3 from the current MCS.  Sample will back off
  quite quickly, so there's no need to sample _all_ MCS rates between
  a high MCS rate and MCS0; there may be a lot of them.

* Modify the smoothing rate to be 75% rather than 95% - it's more adaptive
  but it comes with a cost of being slightly less stable at times.
  A per-node, hysterisis behaviour would be nicer.
Add a debug bit for TX destination filtering.
Add a per-TID filter queue and filter state bits.

These are intended for software TX filtering support, where the NIC
decides there has been too many successive failues to a destination
and will filter it.

Although the filtering is done per-destination (via the keycache),
the state and queue is kept per-TID for now.  It simplifies the overall
architecture design and locking.

Whilst here, add ATH_TID_UNLOCK_ASSERT().
Update generate-release.sh script:

 - Use svn for ports and doc trees
 - When installing a binary textproc/docproj package,
   switch pkg_add(1) to pkg(8) [1]

Reviewed by:	nwhitehorn
Approved by:	nwhitehorn
Enhanced by:	glebius [1]
MFC After:	1 week
X-MFC-To:	9-only
Update usage() in comment section.
Remove CVS_* variables in comments.

MFC after:	1 week
X-MFC-With:	r240586
Update release(7) to reflect changes from r240586 and r240587:

 - Remove cvs(1) references.
 - Remove CVS* environment references.
 - Add default entries for the default SVNROOT for the Ports
   Collection, and Documentation Project.
 - While here, update 'SGML-based documentation' to 'XML-based',
   since the recent SGML->XML conversion.
 - Update an example providing SVNROOT environment usage.

Reminded by:	nwhitehorn
MFC After:	1 week
X-MFC-With:	r240586, r240587
Add some edits to the changed comments so that they make more sense.

MFC after:	1 day
Minor correction.

MFC after:	1 day
Take credit for the work I've done in this source file.
Add the Tegra2 DTS files. Now our dtc supports including other files use
this support to pull out the SoC specific parts of the dts file.
In snmp_hostres, device_map table is used for consistent device table
indexing. When a device has gone it is not removed from device_map
table but just its entry_p field is set to NULL.

So when traversing device_map in disk_OS_get_ATA_disks() and
disk_OS_get_MD_disks() check for entry_p being NULL, otherwise the
bsnmpd crash is possible when a removed map entry is dereferenced.

Before the fix, for disk_OS_get_ATA_disks() the crash could be easily
reproduced running:

  atacontrol detach ata1

The crash was not observed in disk_OS_get_MD_disks() because currently
snmp_hostres does no see md(4) disks: to get the device list it uses
devinfo(3), which does not return md devices.

Reported by:	Miroslav Lachman 000.fbsd quip.cz
MFC after:	1 week
Add a kernel config for the Toshiba AC100. The AC100 is an ARM laptop with
an NVidia Tegra 2 CPU.

Tegra 2 needs an external patch to pmap for atomic operations to work. Even
with this the Kernel only gets to the mount root prompt. As such Tegra
support is considered experimental, however adding the kernel config will
help ensure the Tegra code builds.