[pgsql-jp: 38219] Codepage of EUC_jp is 20932

[ITAGAKI Takahiro]

I found a bug in the definition of EUC_jp codepage.
20932 should be used here instead of 51932. (MSDN might be wrong!)

If we choose EUC_jp as a encoding and 'Japanese, Japan' as a locale,
pginstaller tries to set 'Japanese_Japan.51932' and fails.
Then it sets 'Japanese_Japan' (without locale),
but it means 'Japanese_Japan.932' (SJIS). 
The mismatch of server encoding and locale encoding causes problems.
It might be better to check the locale encoding more strictly.

setlocale(LC_COLLATE, "Japanese_Japan") -> OK (Japanese_Japan.932)
setlocale(LC_COLLATE, "Japanese_Japan.932") -> OK
setlocale(LC_COLLATE, "Japanese_Japan.20932") -> OK
setlocale(LC_COLLATE, "Japanese_Japan.51932") -> ERROR

Regards,
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ITAGAKI Takahiro