[BUG] ssl.match_hostname is deprecated

[jaraco]

setuptools version

main

Python version

3.10b something

OS

CI

Additional environment information

No response

Description

After merging jaraco/skeleton, which includes running tests on Python 3.10, some deprecation warnings manifest as errors: https://github.com/pypa/setuptools/runs/2984838195

Expected behavior

Setuptools should be deprecation-free.

How to Reproduce

Follow the CI steps.

Output

n/a

Code of Conduct

• I agree to follow the PSF Code of Conduct

[jaraco]

Hmm. When I run the tests locally, I don't get the deprecation warnings.

[jaraco]

Aha. The tests that are failing were skipped locally because my environment wasn't configured with viable root certs. After configuring those root certs, the tests are now running and failing similarly locally.

[jaraco]

The errors are all for ssl.match_hostname, which was deprecated in Python 3.7.

After some analysis of the ssl_support module, it seems that most of that module is around providing backward compatibility for ssl.match_hostname. Perhaps that module is no longer needed.