Focal Fossa is now open for development

[Matthias Klose]

Focal Fossa is now open for development, with the syncs from unstable
done and built, and autopkg testers trying to catch up.  The development version 
starts with only a few changes:

  - Python 3.8 is now added as a supported Python3 version, with the
    goal to ship Python 3.8 as the only Python3 version in focal.
    Details will follow on the ubuntu-devel ML.

  - Perl was updated to version 5.30.

  - s390x is now built targeting z13 (GCC only for now).

  - While the Python2 removals imported from Debian are just
    syncs like any others, it's worth pointing out that
    some uncoordinated removals are causing some churn [3],
    and on top of that there is a Ubuntu dept/delta which needs to
    see fixing as well [4].

Please check your uploads in a focal chroot, don't just test in a eoan or bionic 
environment.  See [1] or [2] how to setup such a development chroot.

-- 
[1] https://wiki.ubuntu.com/SimpleSbuild
[2] https://wiki.ubuntu.com/DebootstrapChroot
[3] https://lists.debian.org/debian-python/2019/10/msg00081.html
[4] https://lists.ubuntu.com/archives/ubuntu-devel/2019-October/040833.html