Default behavior of LogSource.getInstance() is now:
* If Log4J is available, return an instance of Log4JCategoryLog
* If JDK 1.4 is available, return an instance of Jdk14Logger
* Otherwise, return an instance of NoOpLogger
As before, this default behavior can be overridden with a system
property, or by calling LogSource.setLogImplementation(), as described
in the package Javadocs.
git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/logging/trunk@138829 13f79535-47bb-0310-9956-ffa450edef68
