migrate bsfilter func keys to new schema
add bsfilter type to populate.sql
fix typo in column name
add infos table
update revision number
dissociate bsfilters that have no boss

to migrate bsfilter funckeys, we need to know the id of the boss
and the secretary. Because of that, Bbfilters that do not have any bosses were
causing problems. So we remove all members in faulty bsfilters
rename functions

make their names more explicit
refactor bsfilter without bosses helper

- delete bsfilter instead of simply dissociating members
- use a single query for selecting bsfilters without bosses
delete bsfilters with mutant bosses and secretaries
forgot to delete func keys at the end of downgrade
Merge branch '5271_func_key_bsfilter'