Features:
+* add "systemctl start -v foobar.service" that shows logs of a service
+ while the start command runs. This is non-trivial to do without
+ races though, since we should flush out all journal messages before
+ returning from the "systemctl stop".
+
* increase CORE resource limit by default for all services, so that coredumpctl becomes useful
* firstboot: make it useful to be run immediately after yum --installroot to set up a machine.