1 - remove TIMEOUT= handling
3 - move /lib/udev/devices/ to tmpfiles
5 - trigger --subsystem-match=usb/usb_device
7 - test (now fixed) /dev/tape/ links
15 - deprecate and warn about RUN+="socket:"
19 - return object with *_unref()
20 - udev_monitor_from_socket()
21 - udev_queue_get_failed_list_entry()