[Mailman-i18n] Dutch translation is taken over for a while by ...

[Danny Terweij]

Hi all,

Sander Steffann sander@steffann.nl is taking over the dutch translation for
a while. So i can do the things what i must do before and after the birth of
the baby :)

Thank you Sander.

Greetings,
Danny Terweij.
Dutch Translator Mailman