Add basic cosmos-rules defaults

Fetched from knubbis-ops

global/overlay/etc/puppet/cosmos-rules.yaml

@@ -1,3 +1,17 @@
 # Note that the matching is done with re.match()
-'^ns[0-9]?.mnt.se$':
+'.+':
-   nameserver:
+   sunet::server:
+      fail2ban: false
+      unattended_upgrades: true
+      disable_ipv6_privacy: true
+      disable_all_local_users: true
+      install_scriptherder: true
+   sunet::ntp:
+      disable_pool_ntp_org: true
+      set_servers: [
+        "gbg1.ntp.se",
+        "mmo1.ntp.se",
+        "sth1.ntp.se",
+        "svl1.ntp.se",
+        "lul1.ntp.se",
+      ]