[issue34847] asyncio: Add PHA for TLS 1.3

Change by Christian Heimes : -- keywords: +patch pull_requests: +9031 stage: -> patch review ___ Python tracker ___ ___ Python-bugs

[issue34847] asyncio: Add PHA for TLS 1.3

New submission from Fantix King : This was raised in GH-9460 where the same post handshake authentication (PHA) was added to the ssl module. It should be added to asyncio too. This issue is to discuss the design of PHA API in asyncio, and implement it in Python 3.8. One approach is to add _SS