Vendor import of tzdata2013h.

- Libya didn't go back to DST.
- Fix Morocco 2038 issue.
- Brazil/Acre and ?Western Amazonas are chaning timezones.

Obtained from:	ftp://ftp.iana.org/tz/releases/
Vendor import of tzdata2013i:

Removed support for solar-time-based time zones
Jordan stays at summer time this year.
Fix historical data for Cuba

Obtained from:	ftp://ftp.iana.org/tz/releases/
Vendor import of tzdata2014a

- Fix historical info about asia/Zion, Ukraine
- Fiji starts DST at 02:00 instead of 03:00
- Turkey will move to DST at 31 March this year.

Obtained from:	ftp://ftp.iana.org/tz/releases/
Vendor import of tzdata 2014b

- Update antartica.
- Comments about historical data for Hawaii.
- Update details for Crimea on 30 March
- Move location data Simferopol.

Obtained from:	ftp://ftp.iana.org/tz/releases/
Vendor import of tzdata2014c

- Egypt goes to DST on 15 May 2014.

Obtained from:	ftp://ftp.iana.org/tz/releases/
Update to tzdata2014e:

Fix historical data for Egypt.
Better prediction for future Egypt / Morocco changes.
Update to Cocos / Cook islands.
Fix historical data for Russia.

Obtained from:	ftp://ftp.iana.org/tz/releases/
Add comment explaining one of the quirks in autofs.

MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Autofs softc needs to be global anyway, so don't pass it as a local
variable, and don't store in autofs_mount.  Also rename it from 'sc'
to 'autofs_softc', since it's global and extern.

MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
vt(4): Fix cursor handling in vt_flush()

There were situations where the cursor was not erased/redrawn or its
position was marked as dirty even though it's not displayed. The code is
now more straightforward.

At the same, add a function to determine if the cursor covers a given
area. This is used by backends to know if they need to draw the cursor.

This new function should be paired with a new state in struct vt_device,
called vd_mshown, which indicates if the cursor should be displayed.
This again simplifies vd_bitblt_text_t callback's API.

MFC after:	1 week
Don't fail on executable maps that return no entries.  This turns useless
error message into useful one.

MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Add "nobrowse" option.  Previously automountd(8) always behaved as if
it was set, now it's conditional.

PR:		192862
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
vt_fb: Implement vd_bitblt_text_t for vt_fb and derivatives

MFC after:	1 week
creator_fb: Implement vd_bitblt_text_t

MFC after:	1 week
ofwfb: Implement vd_bitblt_text_t

MFC after:	1 week
In r260015, I renamed several identifiers to avoid -Wsystem-header
warnings.  In r261283, I imported libc++ 3.4 release, but this contained
one identifier that had not been renamed yet, leading to a compilation
error when using -std=c++1y.  Fix the compilation error by correctly
renaming the identifier.

Reported by:	rcarter@pinyon.org
PR:		base/192139
MFC after:	3 days
Fix arm build breakage when building stable/10 on
head/.

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Also export UNAME_r to fix arm builds.

MFC after:	3 days
X-MFC-with:	r270417
Sponsored by:	The FreeBSD Foundation
Restore pre-r239157 handling of sched_yield(), when thread time slice was
aborted, allowing other threads to run.  Without this change thread is just
rescheduled again, that was illustrated by provided test tool.

PR:		192926
Submitted by:	eric@vangyzen.net
MFC after:	2 weeks
Merge buffer-printing changes from from projects/ipfw as preparation
for branch merge.

Requested by:	luigi
Whitespace/style changes merged from projects/ipfw.