- support kernel-supplied DEVMODE=

- /run/udev/control socket

- read settle_timout from udev.conf

- db_persist -> lvm.git?

- rules_generator:

- no longer rename netif in kernel namespace

- do not create rules on-the-fly, require explicit

configuration

- drop persistent optical names

- kill tabs?

- remove deprecated trigger --type=failed logic

- remove deprecated BUS=, SYSFS{}=, ID= keys