dnsdist: add ipv6 downstream server for pretty grafana

roles/base/files/dnsdist/dnsdist.conf

@@ -5,7 +5,9 @@ addLocal('0.0.0.0')
 setACL({'0.0.0.0/0', '::/0'}) -- Allow all IPs access
 
 newServer({address='127.0.0.1:5300', pool='auth'})
+newServer({address='[::1]:5300', pool='auth'})
 newServer({address='127.0.0.1:5301', pool='recursor'})
+newServer({address='[::1]:5301', pool='recursor'})
 
 -- todo use host_vars
 recursive_ips = newNMG()