Comment 4 for bug 2038894

This can be overridden for cloud images

```
mkdir --parents --verbose /etc/systemd/resolved.conf.d
cat > "/etc/systemd/resolved.conf.d/50-cloudimg.conf" <<EOF
[Resolve]
MulticastDNS=false
EOF
```

results in no longer listening on port 5353

```
$ sudo ss --listening --no-header --tcp --udp --numeric
udp UNCONN 0 0 127.0.0.54:53 0.0.0.0:*
udp UNCONN 0 0 127.0.0.53%lo:53 0.0.0.0:*
udp UNCONN 0 0 10.0.2.15%enp0s2:68 0.0.0.0:*
tcp LISTEN 0 4096 127.0.0.54:53 0.0.0.0:*
tcp LISTEN 0 128 127.0.0.1:6010 0.0.0.0:*
tcp LISTEN 0 4096 127.0.0.53%lo:53 0.0.0.0:*
tcp LISTEN 0 4096 *:22 *:*
tcp LISTEN 0 128 [::1]:6010 [::]:*
```