Please review and provide feedback on 
https://cwiki.apache.org/confluence/display/LOGGING/Properties+Enhancement.

Note that some of the major goals of 3.0 are:

* Fully support the Java Platform Module System by having all relevant jars 
contain a module-info.java class.
* In support of JPMS, have log4j-core have as few dependencies as possible, 
including only requiring java.base.
* The Log4jPlugins.dat file used in 2.x will not work well in a JPMS 
environment so ServiceLoader is now used 
   to load plugin definitions. The Log4jPlugins.dat file will still be 
supported but compilation against the Log4j 3.0 
   annotation process will produce a Log4jPlugins.class instead as well as the 
required ServiceLoader file.
* Move the Log4j annotation processor to its own Jar. It will not be invoked by 
default and will not be included at runtime.
* Require Java 11 as the minimum, thus eliminating the need for multi-release 
jars.
* If possible, improve the wiring of plugins by implementing a minimal 
dependency injection system.
* Remove “strange” interfaces that had to be created before Java 8 provided 
default methods.

While we will strive for as much backward compatibility as possible it is 
possible users may have to recompile their code or make minor changes.

Thanks
Ralph

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