Allow Proxy Bypass for Specified Hosts in no_proxy Variable

Why it matters

This feature allows users to specify hosts for which proxying should be skipped, improving connectivity and performance by avoiding unnecessary proxy usage. It solves the problem of proxy overhead and connectivity issues for certain hosts when a proxy is configured.

How to use it

Users can set the no_proxy environment variable with a comma-separated list of hosts or configure the ClickHouse proxy settings to include hosts that should bypass the proxy. Requests to these hosts will connect directly, ignoring the proxy configuration.