filtering long prefixes

Credit where it's due: I note that PSI is currently
announcing with no more-specific prefixes.

While I have had my differences with PSI, particularly
wrt allocations made in The Swamp, I feel I have to praise
them for doing a remarkably good job of aggregation in
their newer CIDR blocks.

Thanks, PSI! (Now, about your old stuff...)

- --
Sean Doran <>