- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r289038,r289041:

Add encoding for mime-types.

Fix short month names and replace %b with %_m in date_fmt for Chinese
locales.

When using a Chinese locale, such as zh_TW.UTF-8 or zh_CN.UTF-8,
nl_langinfo(ABMON_*) only returned numbers. For instance,
nl_langinfo(ABMON_1) returns 1, nl_langinfo(ABMON_2) returns 2, and
so on.

This causes problems in applications that put the short month name
and the day of the month together. For example, 'Apr 14' in English
becomes '414日' in Chinese on the top bar of GNOME Shell.

This problem may be resolved by appending '月' to all short month
names and replacing %b with %_m in date_fmt. ja_JP.UTF-8 already
does this, and this matches the en_US.ISO8859-1 behavior, which
returns 'Oct'. The GNU C Library also returns values with '月'
appended.

PR: 199441
Submitted by: Ting-Wei Lan <lantw44 gmail com>

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

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

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 %EF

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

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

Convert to new format

$Id$ -> $FreeBSD$

Change locale name of Traditional Chinese : zh_TW.BIG5 -> zh_TW.Big5.
It makes compatible with IANA charset defination, and let existent I18N
app happier.

Ref: <http://www.isi.edu/in-notes/iana/assignments/character-sets>