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04776232f7
Log4j2 can auto-reload its configuration file as long as the reference to a `java.io.File` is provided in the `ConfigurationSource`. Previously, we always created such `ConfigurationSource` with only the URL regardless of its type. Detect when the configuration URL points to a File and create the `ConfigurationSource` accordingly. The `spring-boot-sample-actuator-log4j2` has been updated to reload the logging configuration every 30 sec if necessary. Fixes gh-3024, gh-3030