Outdated ssl documentation wrt changes in OpenSSL 4

Documentation

Hey. It was reported to us in Fedora that ssl.PROTOCOL_TLSv1_2 no longer available in Python. We figured out that this is related to changes in OpenSSL 4 -- https://github.com/python/cpython/commit/3364e7e62fa24d0e19133fb0f90b1c24ef1110c5

@vstinner said:

there are still references to ssl.PROTOCOL_TLSv1_2 and other removed protocols in Lib/ssl.py. Well, don't trust the documentation on this point, the doc is outdated :-)

This is also true for pydoc.

I am redirecting this here for tracking purposes to update the ssl documentation wrt changes in OpenSSL 4.

Linked PRs

• gh-152714

先从 Lib/ssl.py 中对 ssl.PROTOCOL_TLSv1_2 和其他已移除协议的引用开始，然后检查 issue 中提到的 SSL 文档和 pydoc 输出。将它们与 OpenSSL 4 的变更进行比较，并检查链接的 PR gh-152714；当过时的协议引用得到一致更新或移除时，即视为完成。