Linux: set Domains= in systemd.network interface config

This enables use of the given domain as a search and routing domain.
See systemd.network(5). Without this, single-label names don't have
the search domain appended when resolving with systemd-resolved.

Author: kenyon

data/kernel/Linux.yaml

@@ -139,6 +139,7 @@ systemd::networks:
 
       [Network]
       DHCP=yes
+      Domains=%{trusted.domain}
       EmitLLDP=yes
       LLDP=yes
       MulticastDNS=yes