Ansible release 2.9.0b1, feature freeze, and stable-2.9 branching

Hi all- Feature freeze for Ansible-2.9.0 was last week. At that time,
we also branched stable-2.9 from the devel branch. So features can
continue to be opened against devel. They just won't be backported to
stable-2.9.

The creation of the stable branch also means that if you have a bugfix
that should be applied to the 2.9.0 release, it needs to be backported
to the stable-2.9 branch after it has been merged into devel.
Standard rules about backports (no features, higher risk bugfixes will
be evaluated as to whether the risk outweighs the benefits, and
backports need to have changelog fragments) apply.

More information on backports can be found here:
http://docs.testing.ansible.com/ansible/latest/community/development_process.html?highlight=backport#backporting-merged-prs

Ansible 2.9.0 beta1