chore(ansible): clean up host_vars YAML and normalize mail text blocks

host_vars/gw-replacement4.local.netz/gw-replacement4-common.yml

@@ -98,7 +98,7 @@ resolved_nameserver:
 # If there are more than one search domains, then specify them here in the order in which
 # the resolver should also search them
 #
-#resolved_domains: []
+# resolved_domains: []
 resolved_domains:
   - ~.
   - wf.netz
@@ -108,7 +108,7 @@ resolved_dnssec: false
 # dns.as250.net: 194.150.168.168
 #
 resolved_fallback_nameserver:
-   - 194.150.168.168
+  - 194.150.168.168
 
 
 # ---
@@ -172,4 +172,3 @@ bind9_gateway_listen_on:
 root_user:
   name: root
   password: $y$j9T$IVBTpn.OrI6YiQ9q3fA8b1$Y1bmID5yXJbKfoLFt1VmQs6LezeTj5/1M9ppZBD2Pn4
-