When many prefixes are stored in pf tables it is not sensible

to export them via snmp.
Introduce option filter-pf-addresses similar to filter-routes which
prevents exporting below the OPENBSD-PF-MIB::pfTblAddrTable oid.
Other pf table statistics are uneffected by this and still available.
With this I can do a bulkwalk starting at pfMIBObjects without hitting
timeouts and without spinning the cpu at 100% for days to export 300k
prefixes.
man page input kn
OK claudio, sthen. martijn is also fine with it going in.

0 files changed, 0 insertions, 0 deletions