Allow a custom edited list of comma separated blocks to be included

[ivanbishop]

I'd like to block say "US" but I also want to be able to block some CIDR blocks that are NOT in the downloaded current "US" table.

Can we have a feature saying ...
--log-drop-level info --log-drop --counter --table-family netdev -extra $PATH/extras.txt --interface enp1s0 US

Where extras.txt looks like A.B.C.SD/mask ???

thanks