knot-dns: turn on edns-client-subnet in server section to enable geoip

https://www.knot-dns.cz/docs/latest/html/reference.html#edns-client-subnet
2 jobs for 146-use-knot-mod-geoip-for-nextnode-address in 2 minutes and 28 seconds (queued for 1 second)
Status Job ID Name Coverage
  Lint
passed #30163
salt_lint

00:01:13

 
  Highstate
passed #30164
debug_highstate

00:01:14