add fixes to knot-dns

_modules/nextnode.py

@@ -18,6 +18,7 @@ so we need:
 def knot_yaml():
     # pylint: disable=undefined-variable
     tmp = []
+    tmp.append('nextnode.ffffm.net:')
     for domain in __salt__['pillar.get']('domains'):
         global_prefix6 = __salt__['pillar.get'](
             'domains:{}:global_prefix6'.format(domain))
@@ -25,5 +26,7 @@ def knot_yaml():
             'domains:{}:nextnode4'.format(domain))
         nextnode6 = __salt__['pillar.get'](
             'domains:{}:nextnode6'.format(domain))
-        tmp.extend([{"net": global_prefix6, "A": [nextnode4], "AAAA": [nextnode6]}])
+        tmp.append('  - net: {}'.format(global_prefix6))
+        tmp.append('    A: {}'.format(nextnode4))
+        tmp.append('    AAAA: {}'.format(nextnode6))
     return tmp

knot-dns/files/nextnode.conf.j2

-{# upstream docu: https://www.knot-dns.cz/docs/latest/html/modules.html?highlight=subnet#using-subnets #}
+# upstream docu: https://www.knot-dns.cz/docs/latest/html/modules.html?highlight=subnet#using-subnets
 
-nextnode.ffffm.net:
-  {{ salt['nextnode.knot_yaml']()|yaml(True)| indent(2) }}
+{{ salt['nextnode.knot_yaml']() }}