* send SIGABRT when a service watchdog is triggered, by default, so that we acquire a backtrace of the hang.
-* shouldn't RouteMetric= in networkd's [DHCP] section move to [Network]?
-
* dhcp: do we allow configuring dhcp routes on interfaces that are not the one we got the dhcp info from?
* maybe allow timer units with an empty Units= setting, so that they