I am running into this issue and from what i seen of id3300540 it was closed but no comments. I looked at the script and couldn't find it anywhere…. just curious if this is something that is being planned on being included in the next release?
I am fairly certain, that it was included in all 3.x releases.
# List of DBNAMES to EXLUCDE if DBNAMES is empty, i.e. ().
#CONFIG_db_exclude=( 'information_schema' )
If you have other tables like performance schema, you have to add it in the following way:
CONFIG_db_exclude=( 'information_schema' , 'performance_schema' )
Otherwise take a closer look at the config file, most of it is explained quite well.