[CentOS-docs] page for translators

[Marcus Moeller]

Dear Ernesto,

> I already have the "Postfix" how to translated. And started working in
> "Postfix Restrictions", actually I'm working on this translations in
> my private wiki hosted in other place, waiting for the talk with Alain
> Regurea and others to take place, but I can start moving that
> translations over here right now.

Alain might be offline for quite a long time, so just go ahead and
start translating or updating pages if you want to.

Best Regards
Marcus