v.21.3Improvement

Fix DNS Functions for Alpine Images

Make FQDN and other DNS related functions work correctly in alpine images. #20336 (filimonov).
Fix FQDN and other DNS-related functions to work correctly in Alpine Linux images.

Why it matters

This update addresses issues with Fully Qualified Domain Name (FQDN) resolution and other DNS functions failing or behaving incorrectly in Alpine-based ClickHouse Docker images. It ensures reliable DNS functionality, which is crucial for network operations and integrations relying on proper hostname resolution.

How to use it

Users running ClickHouse in Alpine-based Docker images will benefit from this fix automatically upon upgrading to the new version. No additional configuration is required.