Merge pull request #9194 from zalando-incubator/unbound-default

Set unbound as default dns_cache

Author: linki

cluster/config-defaults.yaml

@@ -925,7 +925,7 @@ external_dns_zones_cache_duration: "1h"
 external_dns_mem: "4Gi"
 
 # select which cache to use for Cluster DNS: unbound or dnsmasq.
-dns_cache: "dnsmasq"
+dns_cache: "unbound"
 
 expirimental_dns_unbound_liveness_probe: "true"