Promote: we try to offer the upstream Python

We do have Fedora-only patches: hotfixes, configuration, system integration, or we try new out things like [locale coercion in Python 3.6](https://www.python.org/dev/peps/pep-0538/). But always strive to get them upstream, and align with the greater ecosystem.

Perhaps call the talking point „[Vanilla](https://en.wikipedia.org/wiki/Vanilla_software) is our specialty“?
