Soyuz downtime for apt-ftparchive upgrades

[Adam Conrad]

In order to resolve some bugs with architecture-specific overrides, as
well as get some extra speed improvements to the publisher, drescher is
being upgraded to a new version of the apt suite.

In order to do this, soyuz will be taken offline for several hours
(we're budgeting 12 hours here, though there are rumours it could be
done in as little as 4), while apt-ftparchive is given a chance to
rebuild its caches, and regression tests are performed to make sure the
world didn't explode.

Uploads will still be queued as usual, they just won't be installed into
the archive until this process is complete.

Wish Team Soyuz the best of luck in this one, and everyone give them a
hearty pat on the back when you next see them for working outside of
their usual hours to help minimise our downtime and inconvenience.

... Adam