Integrate i18n SWAT

[TAKAHASHI Motonobu]

Rafal Szczesniak wrote:
>First, I wanted to ask whether it's only for SWAT, or
>everything going to be i18n'ed. Although, I guess (at
>a first glance) it's the latter. 

This change is for SWAT only.
Of course the final target is everything i18n'ed. But we had better do
step by step.

To install manual page of various language version and gettext()'ed
command output are not done yet.

-----
TAKAHASHI, Motonobu(monyo)         monyo at samba.org
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