[issue37952] Add support for export_keying_material to SSL library

[Christer Weinigel]

Change by Christer Weinigel <christer at weinigel.se>:


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keywords: +patch
pull_requests: +23991
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/25255

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37952>
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