py-acme py-certbot*: updated to 1.18.0

1.18.0

Added

New functions that Certbot plugins can use to interact with the user have been added to certbot.display.util. We plan to deprecate using IDisplay with zope in favor of these new functions in the future.
The Plugin, Authenticator and Installer classes are added to certbot.interfaces module as alternatives to Certbot's current zope based plugin interfaces. The API of these interfaces is identical, but they are based on Python's abc module instead of zope. Certbot will continue to detect plugins that implement either interface, but we plan to drop support for zope based interfaces in a future version of Certbot.
The class certbot.configuration.NamespaceConfig is added to the Certbot's public API.

Changed

When self-validating HTTP-01 challenges using acme.challenges.HTTP01Response.simple_verify, we now assume that the response is composed of only ASCII characters. Previously we were relying on the default behavior of the requests library which tries to guess the encoding of the response which was error prone.
acme: the .client.Client and .client.BackwardsCompatibleClientV2 classes are now deprecated in favor of .client.ClientV2.
The certbot.tests.patch_get_utility* functions have been deprecated. Plugins should now patch certbot.display.util themselves in their tests or use certbot.tests.util.patch_display_util as a temporary workaround.
In order to simplify the transition to Certbot's new plugin interfaces, the classes Plugin and Installer in certbot.plugins.common module and certbot.plugins.dns_common.DNSAuthenticator now implement Certbot's new plugin interfaces. The Certbot plugins based on these classes are now automatically detected as implementing these interfaces.
We added a dependency on chardet to our acme library so that it will be used over charset_normalizer in newer versions of requests.

Fixed

The Apache authenticator no longer crashes with "Unable to insert label" when encountering a completely empty vhost. This issue affected Certbot 1.17.0.
Users of the Certbot snap on Debian 9 (Stretch) should no longer encounter an "access denied" error when installing DNS plugins.

(adam)