Updates for python 3.12 final #3337
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Intersphinx links are currently an unpinned dependency, so when a new version of python is released it's possible (although relatively rare) for it to break our links. 3.12 removed a few members of the ssl module.
We previously only typechecked on the oldest version of python we supported, incorrectly assuming nothing we depended on would be removed. Now we typecheck on the latest version of python. Assume support for modern version of ssl and remove some pre-SNI code paths which rely on functions that are now removed.
bdarnell
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Nov 14, 2023
In tornadoweb#3337, the removal of ssl.match_hostname revealed that we did not have any test coverage of hostname checking in tornado.iostream. Since we were forced to remove the manual check that we had in place for old versions of Python, we need a test to make sure that we didn't inadvertently break hostname checking.
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