After feedback from several users still doing _development_ against EL6,
we decided to re-enable epel-6 build chroots temporarily (probably till
the end of ELS of RHEL 6, but without promises).
CentOS 6 repos are not mirrored anymore, so the builds are now done
against the repos on https://vault.c
The Fedora 31 and EPEL 6 chroots are marked as EOL in Copr now (for the epel
case, it's not even easily possible to build there nowadays because CentOS
already stopped mirroring of the repos).
There's additional 180 days period when we keep the build results. If you want
to keep the results longe
