This change:
- Remove code that prevented audit from starting if audit_categories,
audit_tables, and audit_keyspaces are not configured
- Set liveness::LiveUpdate for audit_categories, audit_tables,
and audit_keyspaces
- Keep const reference to db::config in audit, so current config values
can be obtained by audit implementation
- Implement function audit::update_config to parse given string, update
audit datastructures when needed, and log the changes.
- Add observers to call audit::update_config when categories,
tables, or keyspaces configuration changes
New functionality, so no backport needed.
Fixes https://github.com/scylladb/scylla-enterprise/issues/1789Closesscylladb/scylladb#22449
* github.com:scylladb/scylladb:
audit: make categories, tables, and keyspaces liveupdatable
audit: move static parsing functions above audit constructors
audit: move statement_category to string conversion to static function
audit: start audit even with empty categories/tables/keyspaces
8e89f2e88e