Apply HTTP Handler Changes On-the-Fly Without Restart

Why it matters

This feature allows users to update or modify HTTP handlers dynamically, eliminating the need for a full server restart. It improves operational efficiency and reduces downtime when making HTTP handler-related changes.

How to use it

Users can apply changes to HTTP handlers and see them take effect immediately without restarting the ClickHouse server. This is done automatically by the server once the handler configurations are updated.