Support RFC-9440 colon-wrapped Base64 for forwarded client certs#31501

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husunal wants to merge 2 commits intohashicorp:mainfrom

husunal:feature/X-Forwarded-Client-Cert-rfc-9440

Commits on Aug 15, 2025

Add support for RFC 9440/8941 structured headers in client certificate handling
husunal
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Commits on Aug 27, 2025

Add changelog
husunal
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