LibreSSL 2.7.x supports some OpenSSL 1.1 APIs?

Toralf points me towards this Python patch:

https://github.com/gentoo/gentoo/blob/master/dev-lang/python/files/python-3.5.5-libressl-compatibility.patch

It implies that for Python's purposes at least, LibreSSL 2.7.x supports the newer openssl APIs. We should test that out, and if so, support it.