Features:
+* assign MESSAGE_ID to log messages about failed services
+
* coredump: make the handler check /proc/$PID/rlimits for RLIMIT_CORE,
and supress coredump if turned off. Then change RLIMIT_CORE to
infinity by default for all services. This then allows per-service
- kill scsi_id
- add trigger --subsystem-match=usb/usb_device device
- reimport udev db after MOVE events for devices without dev_t
+ - don't keep stale db in case event processing fails (also notify userspace about the failure)
* when a service has the same env var set twice we actually store it twice and return that in systemctl show -p... We should only show the last setting