See http://www.haskell.org/pipermail/cabal-devel/2012-September/009035.html for details
Urgent, as if we're going to do this then we need to do it before the Hackage2 switchover.
Ideally, It would be a self-contained phase of the mirroring process, so that we can run that phase only on the existing new-hackage test site.
This alternatively could be stored in the export tarball as part of the bulk legacy import process.
Right, either bulk import to just done ad-hoc via http PUT using curl and a script.
I have extended the new hackage-import client so it does now support uploading the deprecated info about packages.