https://mailarchive.ietf.org/arch/msg/tls/VrGNv1kY3o6BaDub5rknvtwvIe8/
[TLS] Certificate keyUsage enforcement question (new in RFC8446 Appendix E.8)
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https://mailarchive.ietf.org/arch/msg/tls/jis9YnDm90lf4h3jasbL472O1M4/
[TLS] [Errata Held for Document Update] RFC8446 (6125)
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