Fix small documentation mistakes.

Submitted by:	brueffer
Approved by:	kib (mentor)
After thinking about this a bit more, let's not keep statistics per-channel
in the HAL.  That's very memory hungry (32k just for channel statistics)
which would be better served by keeping a summary in the ANI state.

Or, later, keep a survey history in net80211.

So:

* Migrate the ah_chansurvey array to be a single entry, for the current
  channel.
* Change the ioctl interface and ANI code to just reference that.
* Clear the ah_chansurvey array during channel reset, both in the AR5212
  and AR5416 reset path.
As cron(8) is started with '-s' by default, timezones that observe
DST should not need to worry about scheduling jobs when the DST time
changes.

Rather than removing the BUGS section in crontab(5) regarding this,
note that disabling '-s' may still cause jobs to be executed twice or
not at all.

PR:		166318
Submitted by:	Florian k Unglaub (f.unglaub%googlemail!com)
MFC After:	1 week
Change cc -> bc : "bc" is "busy count", which is the % of time the channel
is considered "busy but not doing any active TX or frame RX."

Just keep in mind that "frame RX" is "decoding what looks like a wifi
signal", not necessarily "frame successfully decoded for this particular
device."
Use standard getopt(3) error message.

Submitted by:	jilles
Approved by:	kib (mentor)
Add src.conf option WITH_SHARED_TOOLCHAIN to enable building the
toolchain binaries as dynamically linked.  Option is disabled by
default.

Reviewed by:	ru (previous version)
MFC after:	2 weeks
Regenerate src.conf(5)
Add a convenience macro for the returns_twice attribute, and apply it to
the prototypes of the appropriate functions (getcontext, savectx,
setjmp, sigsetjmp and vfork).

MFC after:	2 weeks
Fix WITHOUT_EXAMPLES build:
While removing unnecessary entries from .PATH.c I missed that for the
examples WPA_SUPPLICANT_DISTDIR/HOSTAPD_DISTDIR is explicitly added to
.PATH.

Tested by:	lev
MFC after:	2 weeks
Add multiple inclusion protection.

PR:		165025
Submitted by:	Gavin Mu
MFC after:	1 week
Drag in subr_acl_nfs4.c for ZFS automatically, otherwise it's
unintuitive that "options zfs" requires "options ufs_acl".
Partially revert r232938; ZFS only requires nfs4 but not posix1e.

Submitted by:	jhb
Previously, vfscanf()'s wide character processing functions were
reading wide characters manually.  With this change, they now use
fgetwc().  To make this work, we use an internal version of fgetwc()
with a few extensions: it takes an mbstate * because non-wide streams
don't have a built-in mbstate, and it indicates the number of bytes
read.

vfscanf() now resembles vfwscanf() more closely.  Minor functional
improvements include working xlocale support in vfscanf(), setting the
stream error indicator on encoding errors, and proper handling of
shift-based encodings.  (Actually, making shift-based encodings work
with non-wide streams is hopeless, but the implementation now matches
the broken specification.)
Add support for Multi-TT mode of modern USB HUBs.
This will give you more bandwidth for isochronous
FULL speed applications connected through a
High Speed HUB.

This patch has been tested with XHCI and EHCI.

MFC after:	1 week
s/gmirror/graid/
Allow users of gprof to get per run output files (using the pid)

PR:		bin/99800
Submitted by:	Peter Jeremy <peterjeremy@optushome.com.au>
Reviewed by:	jilles (code)
Reviewed by:	dwhite (doc)
Approved by:	cperciva
MFC after:	1 week
pread(2) might fail with EBUSY, so document it

PR:		docs/167201
Submitted by:	Kurt Jaeger <fbsd-ports@opsec.eu>
Approved by:	cperciva
MFC after:	3 days
Add support for:
	Olympus FE-210 camera
	LG UP3S MP3 player
	Laser MP3-2GA13 MP3

PR:		usb/119201
Submitted by:	Peter Jeremy <peterjeremy@optushome.com.au>
Approved by:	cperciva
MFC after:	1 week
Copy recent changes from etc/root/dot.cshrc that make the defaults more
user friendly

Approved by:	cperciva
MFC after:	3 days
Catch the user-error when no queue name was specified on an
lpc-command which supports '-msg' (e.g.: setstatus).  Print
out a helpful error message instead hitting a seg-fault.

MFC after:	3 weeks