F12 rawhide presto testing enabled?

[Bill Nottingham]

Adam Williamson (awilliam at redhat.com) said: 
> I think they were disabled for a while because Rawhide composes were
> taking such a huge amount of time, but since that's been fixed I don't
> think there's any reason to leave them disabled outside of mass
> rebuilds, AFAIK anyway.

deltas will not survive a rawhide transition of unsigned -> signed
packages properly, so they are disabled until the signed packages
land.

Bill