[Mirrors] Update on reviving mirrors

[David Boswell]

I wanted to send out the latest news about getting the mirrors working
again.  Pete is planning to get things back up today.  He needs to move
the syncing script to a different machine and repoint things to pull
from the new location.

We appreciate everyone's patience while we deal with this and other
open issues.  We are in the process of ramping up mozdev's staff and
our goal is to be able to respond to these sorts of issues more quickly
going forward.

David