it looks like some of the functionality has been moved from systemd-networkd to systemd-resolved. unfortunately, is seems like something got lost along the way.
namely the domain part of the dhcp reply does not get written to /run/systemd/network/resolv.conf.
the nameserver part works fine.
also, a quick peek at the resolved-manager.c source indicates no support for domain.
please revert the changes or finish the transition completely. the current state results in broken systems.
Patch posted: http://lists.freedesktop.org/archives/systemd-devel/2014-July/021480.html
That patch will only apply to master, I will attach a different version that applies to v215 just in case anyone is interested.
Created attachment 103315 [details] [review]
resolved: re-add support for getting local domain from DHCP
In the end we did something slightly different from Mike's patch, but this sholud work now. Please holler if not.