Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Long long time ago, several utilities in base used to parse %c output and
we were not able to change c_fmt without breaking these utilities. Since
ache fixed all known issues 8 years ago, now we make ko_KR more usable.
Better late than never...

AM/PM should come first in korean.

ko_KR: AM/PM date format should be localized.

Inspired by: r193869

Comments fixing
1) Back out "month names" -> "months names" and fix few such cases which
are wrong initially
2) "weekdays names" -> "weekday names"

Noted by: des [1]

Comments fixing
"month names" -> "months names"
typo
"Long months names (alternative)" or "in alternative form" ->
"(without case ending)"
"Long months names" -> "Long months names (as in a date)"
to not confuse developers on what purpose those sections are

Add padding for some short names to make their length the same to not
break colums

Remove fixed length restrictions and padding

Replace %y with %Y

Convert to new locale format with md_order and without E[Ff]_fmt
Add ampm_fmt to all locales

Fix date

Submitted by: CHOI Junho <cjh@FreeBSD.ORG>

Don't use %E* in old fields for compatibility reasons

Convert after %Ex->%Ef and %EF adding

Convert to new format

$Id$ -> $FreeBSD$

Fix length-related bugs
Submitted by: Choi Jun Ho <choi.junho@jazz.snu.ac.kr>

This variant is commented
Submitted by: Choi Jun Ho <choi.junho@jazz.snu.ac.kr>

Add Korean LC_TIME
Submitted by: junker@jazz.snu.ac.kr