certbot will switch to Python 3 sometime in the future. If we want to ship the same version in EPEL 7 we need to provide a Python 3 version of python-acme (and thus python-ndg_httpsclient).
changes ready, will commit end of this week unless other maintainers object.
This package has changed maintainer in the Fedora. Reassigning to the new maintainer of this component.
Just wanted to note that we might be able to ignore this bugzilla issue as the certbot team plans (tentatively) to just drop the dependency on ndg_httpsclient when migrating to Python 3 only (https://github.com/certbot/certbot/issues/7901).
certbot dropped the dependency on "requests[security]" so this is not needed anymore: https://github.com/certbot/certbot/pull/8626