Currently the precision attribute of the NamedConverter (%logger, %c, %lo keywords) abbreviates the FQN of the based on a max number of characters.

This was a major headache for us when migrating from log4j, because our logger hierarchy was carefully designed so that many appenders only output the last 2 tokens, which is impossible with the current NamedConverter.

Perhaps the log4j 2 equivalent can serve as an inspiration.

Additionally, the Abbreviator could be made pluggable.