Allow mix extra through ini file

[lucienfregosi]

Hi thanks for your work on that log formatter.

I want to use it through an ini file but I also want to add some extra param like root.info('test file config', extra={'jobId': jobId, 'flowId': flowId})

I didn't find a way to specify inside the ini file this specific option mix_extra=True do you have an idea if it's possible ? or do I have to declare the logger inside the code for using extra option ?

Many thanks