Bug #46633 Obsolete Serbian locale name

Description:
According to MySQL's Bogdan Kecman and according to IANA
http://www.iana.org/assignments/language-subtag-registry
(which will be our official authority for language and region subtag codes),
the locale name 'sr_YU' is obsolete.
We should continue to allow it in case somebody has used it, it's harmless.

However we should also allow 'sr_RS' with exactly the same rules as 'sr_YU'.

We should not also allow 'sr_CS' which is also obsolete.
This affects @@lc_time_names and @@lc_messages.
The MySQL Reference Manual
http://dev.mysql.com/doc/refman/5.1/en/locale-support.html
should describe sr_SR as 'Serbian - Serbia'.

How to repeat:
How to repeat:
SET @@lc_time_names='sr_YU';
SET @@lc_time_names='sr_RS';

Thank you for the bug report.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/87253

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/87254

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/87744

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/88464

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/88575

2909 Alexander Barkov	2009-10-29
      A postfix for Bug#46633 Obsolete Serbian locale name
      
      Re-Allowing sr_YU with a "deprecated" warning.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/88977

2904 Alexander Barkov	2009-11-02 [merge]
      Merging a postfix for Bug#46633 Obsolete Serbian locale
      from mysql-next-mr-bar

Pushed into 6.0.14-alpha (revid:alik@sun.com-20091103083733-yon5t2ixj51ozcv3) (version source revid:bar@mysql.com-20091102173853-6hiovm598quhb52m) (merge vers: 6.0.14-alpha) (pib:13)

Pushed into MySQL 5.5.0-beta and MySQL-6.0-14-beta.

Noted in 5.5.0, 6.0.14 changelogs.

The Serbian locale name 'sr_YU' is obsolete. It is still recognized
for backward compatibility, but 'sr_RS' now should be used instead.

Pushed into 5.5.0-beta (revid:alik@sun.com-20091110093229-0bh5hix780cyeicl) (version source revid:mikael@mysql.com-20091103113702-p61dlwc6ml6fxg18) (merge vers: 5.5.0-beta) (pib:13)