symfony/http-kernel@d2e26c5#diff-f1fb6e1fbbca77aacb544d3c6b218515

Introduced in Symfony 4.1.3

From this update I got errors with headers

An exception has been thrown during the rendering of a template ("The request has both a trusted "FORWARDED" header and a trusted "X_FORWARDED_PORT" header, conflicting with each other. You should either configure your proxy to remove one of them, or configure your project to distrust the offending one.").