Comment 0 for bug 1422290

This branch adds default charsets handling for Windows archives in CJKV+th locale, inspired by Ubuntu Kylin way.

As a result of bug #580961, two options have been added as Ubuntu patch.
> -O CHARSET specify a character encoding for DOS, Windows and OS/2 archives
> -I CHARSET specify a character encoding for UNIX and other archives

Then Ubuntu Kylin added default encoding as environment variables for their distribution.
http://bazaar.launchpad.net/~ubuntukylin-members/ubuntukylin-default-settings/trunk/revision/171

Now as Ubuntu, we can go further by a better way:
 - per user settings by their locales instead of global settings
 - don't interfere in other locales by locale guard

I only add "-O", so no behavior change for zip files created on Ubuntu or other Linux/UNIX systems. This branch just handles zip file created on localized Windows system seamlessly.

charsets list is taken from:
https://msdn.microsoft.com/en-us/goglobal/bb964654
and
msdos/msdos.c in unzip package:
   1682 case 932: /* Japanese */
   1683 case 949: /* Korean */
   1684 case 936: /* Chinese, simple */
   1685 case 950: /* Chinese, traditional */
   1686 case 874: /* Thai */
   1687 case 1258: /* Vietnamese */

(Copied from @nobuto's branch description.)