1 - sticky bit for 'dead' pre-created devnodes
5 - test (now fixed) /dev/tape/ links
7 - warn about fallback of IMPORT{program} for built-in commands
9 - /run/udev/control socket
10 (add ConditionVirtualization=!pidns)
12 - move udevd -> --libexecdir
14 - allow path_id, usb_id, usb_db, pci_db as built-in?
16 - kill rules_generator:
17 - no longer rename netifs in kernel namespace
18 - drop persistent optical names
19 - do not create rules on-the-fly, require explicit configuration
20 for netifs and optical drives
21 - properly document what system management needs to put
24 - move udevadm -> --bindir
26 - remove deprecated trigger --type=failed logic
28 - remove deprecated BUS=, SYSFS{}=, ID= keys
30 - remove RUN+="socket:"
34 - libudev: return proper errno or set errno