* networkd:
- add more keys to [Route] and [Address] sections
- add support for more DHCPv4 options (and, longer term, other kinds of dynamic config)
- - send hostname to DHCP server
- add proper initrd support (in particular generate .network/.link files based on /proc/cmdline)
- add reduced [Link] support to .network files
- add Scope= parsing option for [Network]
- properly handle routerless dhcp leases
- - add veth netdev support (c.f. http://shorewall.net/bridge-Shorewall-perl.html#veth)
+ - default to DHCP unicast, but make broadcast opt-in. detect devices that needs broadcast and opt-in automatically (needs kernel patch?)
- add more attribute support for SIT tunnel
- make metric of routes configurable
- work with non-ethernet devices