feature request: loader should log where it found config files

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In several places in Loader, such as here:
https://github.com/apache/logging-log4j2/blob/2.x/log4j-core/src/main/java/=
org/apache/logging/log4j/core/util/Loader.java#L94
There's a message at trace level saying basically "Trying to find [FILENAME=
] using THINGY".
This is very useful, because it lets you know all the places that log4j is =
looking for config files.
However, there's no good way to find which of these attempts succeeded.
Earlier today I had to put a debug breakpoint inside this class to find out=
 which log4j2.xml was getting loaded.
It would be nice if successful attempts were logged, perhaps even at a leve=
l higher than trace.  (maybe debug??)

Thoughts?

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