Stop relying on stdlib hostname matching until hostname_checks_common_name bug fixed
Stop relying on stdlib hostname matching until hostname_checks_common_name bug fixed

I can't make hostname_checks_common_name work, either locally or on
GitHub Actions, so stop using the standard library to match hostnames
for now.

Per https://bugs.python.org/issue43522 this is a bug in CPython ssl module
and will likely be available in 3.10.0-alpha7 of CPython
sigmavirus24/urllib3,urllib3/urllib3,urllib3/urllib3,sigmavirus24/urllib3