MFC r303541, r303542, r303543, r303545, r303546, r303547, r304225, r304226, r304605, r304676, r305212, r305863:

r303541:
Use nitems() from sys/param.h.

Sponsored by: gandi.net (BSD Day Taiwan)
MFC after: 2 weeks.

r303542:
Use nitems() from sys/param.h.

MFC after: 2 weeks.
Sponsored by: gandi.net (BSD Day Taiwan)

r303543:
Use nitems() from sys/param.h.

MFC after: 2 weeks.
Sponsored by: gandi.net (BSD Day Taiwan)

r303545:
Use nitems() from sys/param.h.

MFC after: 2 weeks.
Sponsored by: gandi.net (BSD Day Taiwan)

r303546:
Use nitems() from sys/param.h.

MFC after: 2 weeks.
Sponsored by: gandi.net (BSD Day Taiwan)

r303547:
Use nitems() from sys/param.h.

MFC after: 2 weeks.
Sponsored by: gandi.net (BSD Day Taiwan)

r304225:
Use nitems() from sys/param.h.

MFC after: 2 weeks.

r304226:
Use nitems() from sys/param.h.

MFC after: 2 weeks.

r304605:
Fix calloc(3) argument order.

Reviewed by: trasz
MFC after: 4 weeks.
Differential Revision: https://reviews.freebsd.org/D7532

r304676:
Fix calloc(3) argument order.

MFC after: 4 weeks.

r305212:
- Invert calloc(3) argument order.

MFC after: 4 weeks

r305863:
Invert calloc(3) argument order.

Reviewed by: ed.
MFC after: 4 weeks.
Differential Revision: https://reviews.freebsd.org/D7902

MFC r305813:
localedef(1): make better use of calloc(3) arguments.

The first argument of calloc(3) should be an ordinal type, and the
second a size: split a multiplication to make better use of calloc(3)
and detect overflows.

Do some other re-ordering and style fixes while here.

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

localedef(1): minor spelling fixes on comments.

No functional change.

Plug memory leaks

Reported by: Coverity
CID= 1338535, 1338536, 1338542, 1338569, 1338570

Eliminate some gcc pragmas

Fix an off by one due to bad conversion from avl(3) to tree(3)
Readd calloc as it was not the issue just the messenger

Submitted by: dim
Found by: Address Sanitizer

Run memset only after having checked the return of malloc

Submitted by: pluknet

Workaround an issue on i386 to unbreak the build until the real issue is tracked
down

Improve collation string and locales support

Merge collation support from Illumos and DragonflyBSD.

Locales are now generated with the new localedef(1) tool from CLDR POSIX files.
The generated files are now identified as "BSD 1.0" format.

The libc now only read "BSD 1.0" locales definitions, all other version will be
set to "C"
The localedef(1) tool has been imported from Illumos and modified to use tree(3)
instead of the CDDL avl(3)
A set of tool created by edwin@ and extended by marino@ for dragonfly has been
added to be able to generate locales and the Makefiles from the vanilla CLDR
unicode databases + a universal UTF-8 charmap (by marino@)
Update the locales to unicode v27
Given our regex(3) does not support multibyte (yet) it has been forced to always
use locale C
Remove now unused colldef(1) and mklocale(1)
Finish implementing the numeric BSD extension for ctypes
The number of supported locales has grown from 175 to 250 locales. Among the new
locales: 6 Arabic locales (AE EG JO MA QA SA), Different variations of spanish
locales.
Added new 3 components locales for mn_Cyrl_MN, sr_Cyrl_RS sr_Latn_RS,
zh_Hans_CN, zh_Hant_HK and zh_Hant_TW. Some aliases has been for 2 components
version when possible.

Thanks: Garrett D'Amore (Illumos) who made sure all his work was done under
BSD license!, Edwin Groothuis (edwin@) for the work he made on tools to be able
to generate locales definition usable in freebsd sources out of vanilla CLDR
definitions, John Marino (DragonflyBSD) who first merge the Illumos work into
Dragonfly and spent hours tracking down bugs.

Merge from HEAD

Convert localedef(1) from avl to RB trees

Add localedef(1), a locale definition generator tool

The localedef tool can read entire (and unmodified) CLDR posix definition
files, and generate all 6 LC categories: LC_COLLATE, LC_CTYPE, LC_TIME,
LC_NUMERIC, LC_MONETARY and LC_MESSAGES.

This tool has a long history with Solaris. The Nexenta developers
modified it to read CLDR files and created the much richer collation
formats. The libc collation functions have to be modified to read the
new format (called "BSD-1.0") and to handle the new data structures.

The result will be that locale-sensitive tools and functions will now
properly sort multibyte and unicode strings.

Obtained from: Dragonfly