The date part is not set external, but internal via a flag.
The file name extension cannot be set anymore and the file_name_ext has
been removed and is now log_file_name_ext and privte.
This is a drop in solution and can be used with previous settings.
Changes that should be done:
Class.Login: remove the file name ext and replace it with log_per_class
= 1
Remove all file_name_ext entries as they area not needed anymore
03be3a317f