ClickHouse-Keeper Adds Support for ZooKeeper-like Digest ACLs

Why it matters

This feature adds support for digest ACLs in clickhouse-keeper, enabling secure authentication and authorization similar to ZooKeeper. It helps users manage permissions more securely and compatibly when using clickhouse-keeper as an alternative to ZooKeeper.

How to use it

Users can configure digest ACLs in clickhouse-keeper to control access, following ZooKeeper's ACL syntax and semantics. This allows specifying authenticated users with passwords to define access permissions for nodes.