This uses a dispatcher script to configure filtering A and AAAA records
based on which IP versions are routable on the NM primary connection.

gojq is preferred over the 'standard' jq because it's considerably
faster... the dispatcher script took 0.89s on my L5 with jq, and 0.07s
with gojq. the difference is probably greater on slower phones... so it
seemed worth installing it.

fixes #1430

Co-authored-by: Arnavion <me@arnavion.dev>