Added support for user identification in ClickHouse using the x509 SubjectAltName extension.
Why it matters
This feature enables ClickHouse to authenticate and identify users based on the x509 certificate's SubjectAltName extension. It improves security by leveraging certificate attributes for user identification, simplifying user management and enhancing integration with PKI-based authentication systems.How to use it
To use this feature, configure ClickHouse to utilize the x509 SubjectAltName extension for user authentication by enabling the appropriate SSL/TLS settings and mapping the SubjectAltName attributes to ClickHouse user identities in the server configuration.