host: vmhost0: Set host-specific network config

*vmhost0.pyrocufflink.blue* no longer uses `dhcpcd` for network
configuration, but *systemd-networkd*.

The host-specific network settings for a VM host include the
configuration for the management interface, as well as the configuration
of the physical ports that make up the bonded interfaces.

hosts.offline

@@ -21,6 +21,7 @@ koji0.pyrocufflink.blue
 koji0.pyrocufflink.blue
 
 [networkd]
+vmhost0.pyrocufflink.blue
 
 [pyrocufflink]
 koji0.pyrocufflink.blue