systemd System and Service Manager
CHANGES WITH 222:
+ * udev does not longer support the WAIT_FOR_SYSFS= key in udev rules.
+ There are no known issues with current sysfs, and udev does not need
+ or should be used to work around such bugs.
+
+ * udev does no longer enable USB HID power management. Several reports
+ indicate, that some devices cannot handle that setting.
* The udev accelerometer helper was removed. The functionality
is now fully included in iio-sensor-proxy. But this means,