gh-133623: Add ssl.HAS_PSK_TLS13 to detect external TLS 1.3 PSK support #133624
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Notes
Please see #133623's description for broader discussion of the feature.
AWS-LC now sets an
OPENSSL_NO_EXTERNAL_PSK_TLS13macro that this PR uses to detect external TLS 1.3 PSK support.This PR is largely based on PR #128036's patterns. If the edit to
Doc/whatsnew/3.15.rstis unnecessary, I'm happy to remove it.Testing
📚 Documentation preview 📚: https://cpython-previews--133624.org.readthedocs.build/