Comment 8 for bug 1784501

To be fair, it's also possible that I did something like the following in my previous test container and forgot about it. ;-)

cat << EOF > maas.xml
<network>
  <name>maas</name>
  <forward mode='bridge'/>
  <bridge name='br0'/>
</network>
EOF
virsh net-define maas.xml
rm maas.xml
virsh net-start maas
virsh net-autostart maas