systemd-networkd: use mac vlan in systemd-nspawn

Document List:

• systemd-networkd
• systemd.network
• systemd.netdev

Random MAC Generator

#/etc/systemd/network/mv-mv0.network

[Match]
Name=mv-mv0

[Link]
MACAddress=00:16:3e:03:94:24

[Network]
DHCP=yes