LOG4J2-2975 What to do with SLF4J 2.0.0 LoggingEventAware

[Volkan Yazıcı]

In LOG4J2-2975 <https://issues.apache.org/jira/browse/LOG4J2-2975>, the
user tries to run SLF4J fluent API (introduced in 2.0.0-alpha) against
log4j-slf4j18-impl. Due to missing LoggingEventAware implementation, source
location is not captured right. What shall we do? Keep on telling people to
move away from SLF4J API?