Restores the old signature for select_subnets

RM8734 update

RM8734 introduced better logging but also modified the signature of
select_subnets, accidentally breaking the is_strategy_satisified call in
a subtle way. This restores it and changes the logging to pull the
ip_version from the filters dict instead.
Merge pull request #269 from Cerberus98/RM8734

Restores the old signature for select_subnets