+ - maybe have bool flag in .link units to enable promiscuous mode for interfaces
+ http://lists.freedesktop.org/archives/systemd-devel/2014-July/021568.html
+ - .network setting that allows overriding of the hostname to send to the dhcp server
+ http://lists.freedesktop.org/archives/systemd-devel/2014-July/021550.html
+ - add per-network Domains= settings, with a special syntax Domains=*
+ for routing all non-otherwise routed traffic to this link
+ - add UseDomains= setting to [DHCP] to add dhcp supplied domains to
+ per-interface Domains= list.
+ - expose in the API the following bits:
+ - option 15, domain name and/or option 119, search list
+ - option 12, host name and/or option 81, fqdn
+ - option 100, 101, timezone
+ - option 123, 144, geolocation
+ - option 252, configure http proxy (PAC/wpad)