[issue27391] server_hostname should only be required when checking host names

[Yury Selivanov]

Yury Selivanov added the comment:

> SSL contexts, https://docs.python.org/3/library/ssl.html#ssl-contexts,
have an attribute, check_hostname, which controls whether hostname checking is required. If set to false in a context passed to create_connection, then it makes no sense to require server_hostname under any circumstances.

This makes sense.  I'm reopening this issue.  Jim, would you be able to submit a PR to github/python/asyncio?

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status: closed -> open

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