ihome.nas: disable ipv6 on avahi to try to mitigate intermittent problems

bundles/avahi-daemon/files/avahi-daemon.conf

@@ -1,7 +1,7 @@
 [server]
 host-name=${node.name.split('.')[-1]}
 use-ipv4=yes
-use-ipv6=yes
+use-ipv6=${'yes' if node.metadata.get('avahi-daemon/use-ipv6') else 'no'}
 allow-interfaces=${','.join(sorted(node.metadata.get('interfaces', {}).keys()))}
 ratelimit-interval-usec=1000000
 ratelimit-burst=1000
@@ -14,7 +14,7 @@ disable-publishing=no
 disable-user-service-publishing=no
 publish-hinfo=yes
 publish-workstation=no
-publish-aaaa-on-ipv4=yes
+publish-aaaa-on-ipv4=no
 publish-a-on-ipv6=no
 
 [reflector]