Conflicts:

	logback-core/src/main/java/ch/qos/logback/core/util/Loader.java

Propertyaction handle filenotfound gracefully

Sometimes those files referenced are optional, and a full stack trace does not contain additional information in that case. Resources already follow that principle to print a "Not Found" message without stacktrace when it cannot be found and only the stacktrace when there is a problem reading a found resource.

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