1 - /run/udev/control socket
3 - read settle_timout from udev.conf
5 - db_persist -> lvm.git?
8 - no longer rename netif in kernel namespace
9 - do not create rules on-the-fly, require explicit
11 - drop persistent optical names
15 - remove deprecated trigger --type=failed logic
17 - remove deprecated BUS=, SYSFS{}=, ID= keys