Issue #22638: SSLv3 is now disabled throughout the standard library.
It can still be enabled by instantiating a SSLContext manually.

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branch : 3.4
extra : source : e971f3c57502a51de36848ca20ad1733620eaa0d
Issue #22894: TestCase.subTest() would cause the test suite to be stopped when in failfast mode, even in the absence of failures.

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branch : 3.4
document that cadefault does nothing now

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branch : 3.4
don't require OpenSSL SNI to pass hostname to ssl functions (#22921)

Patch by Donald Stufft.

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branch : 3.4
extra : amend_source : 726a30a9990a8b740aa68c8618e1aabdaf041097
correct versionchanged version

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branch : 3.4