Update nsd pillar role config

- add database disable switch under `config_data`
- remove `ip4-only` switch under `config_data` (it is host dependent)

Signed-off-by: Pratyush Desai <pratyush.desai@liberta.casa>

pillar/role/dns/nsd.sls

@@ -3,7 +3,7 @@ nsd:
     server:
       hide-version: 'yes'
       verbosity: 2
-      ip4-only: 'yes'
+      database: ""
   remote-control:
       control-enable: 'yes'
       control-interface: '/run/nsd/nsd.sock'