I rely heavily on splitting mail according to the registry (the
principal reason I do client side splitting) and just recently started
tracking sender and subject. I notice that splitting according to
references/in-reply-to obeys the ignore-groups variable, while splitting
by sender and subject do not. Is there a reason for this? If not I would
propose making them all behave the same way.


Attached is a suggested patch.

Regards,
Andy