Sometimes when you change the configuration, this configuration change
will only be available after a shutdown. Not to have to monitor when the
vm shuts down, to start it again. It could be nice to have libvirt start
it one time. Something like:
1. change the network interface of a running guest
2. at the prompt of the virt-manager "Some changes may require a guest
shutdown to take effect"
introduce check box 'Auto start vm upon next shutdown'
3. shutdown the guest
4. after the guest completed shutdown, libvirt is automatically starting
it again.
