1 - find a way to tell udev to not cancel firmware
4 - scsi_id -> sg3_utils?
6 - make gtk-doc optional like kmod
8 - move /usr/lib/udev/devices/ to tmpfiles
10 - trigger --subsystem-match=usb/usb_device
12 - kill rules_generator
16 - remove RUN+="socket:"
20 - return object with *_unref()
21 - udev_monitor_from_socket()
22 - udev_queue_get_failed_list_entry()