Log Message:
py-acme py-certbot: updated to 1.9.0

Certbot 1.9.0

Added

--preconfigured-renewal flag, for packager use only.
See the packaging guide.

Changed

certbot-auto was deprecated on all systems except for those based on Debian or RHEL.
Update the packaging instructions to promote usage of python -m pytest to test \ 
Certbot
instead of the deprecated python setup.py test setuptools approach.
Reduced CLI logging when reloading nginx, if it is not running.
Reduced CLI logging when handling some kinds of errors.

Fixed

Fixed server_name case-sensitivity in the nginx plugin.
The minimum version of the acme library required by Certbot was corrected.
In the previous release, Certbot said it required acme>=1.6.0 when it
actually required acme>=1.8.0 to properly support removing contact
information from an ACME account.
Upgraded the version of httplib2 used in our snaps and Docker images to add
support for proxy environment variables and fix the plugin for Google Cloud
DNS.