[SM-I18N] Update simplified Chinese (zh_CN) translation & please convert to UTF-8

[Dongsheng S. <don...@us...>]

In the file '/trunk/locale/TRANSLATORS':
  Chinese (Simplified) - zh_CN - gb2313

'gb2313' is typo for 'gb2312'.


Please update the following files for convert simplified Chinese (zh_CN)
to UTF-8:

branches/SM-1_4-STABLE/squirrelmail/functions/i18n.php
/trunk/locales/locale/zh_CN/setup.php
/trunk/locales/locale/zh_CN/LC_MESSAGES/squirrelmail.po
/trunk/locales/locale/zh_CN/LC_MESSAGES/plugins/address_add.po
/trunk/locales/locale/zh_CN/LC_MESSAGES/plugins/avelsieve.po
/trunk/locales/locale/zh_CN/LC_MESSAGES/plugins/select_range.po
/trunk/locales/locale/zh_CN/LC_MESSAGES/plugins/twc_weather.po
/trunk/locales/help/zh_CN/addresses.hlp
/trunk/locales/help/zh_CN/basic.hlp
/trunk/locales/help/zh_CN/compose.hlp
/trunk/locales/help/zh_CN/FAQ.hlp
/trunk/locales/help/zh_CN/folders.hlp
/trunk/locales/help/zh_CN/main_folder.hlp
/trunk/locales/help/zh_CN/options.hlp
/trunk/locales/help/zh_CN/read_mail.hlp
/trunk/locales/help/zh_CN/search.hlp

The attachment is the updated zh_CN translation.

Because Bo Jin not active after 2003, I would like to be the zh_CN maintainer.

Dongsheng Song