[i18n] updated polish translation for Horde

[Jan Schneider]

Zitat von Krzysztof <krzysztof113 at o2.pl>:

> Hi
>
> Here you'll find updated polish translation files for horde:
>
> http://krznet.easyisp.pl/horde_translation_pub.zip
>
>
>
> Best Regards
>
> Krzysztof Kozera

Committed, thanks!

When doing translation submissions in the future, please make sure to  
update the PO headers, but don't overwrite existing headers.
-- 
Jan Schneider
The Horde Project
http://www.horde.org/