[feature request] Add support for '--types=all' when using 'udevadm trigger'

[apteryks]

Hi,

It'd be nice if eudev could integrate systemd/systemd@1baeee5, which adds support for udevadm trigger --change=add --types=all. Currently one must use two calls at boot to create the devices and subsystems nodes:

udevadm trigger --change=add --types=devices
udevadm trigger --change=add --types=subsystems

The all types would be useful in case other types are added in the future, as it'd means users of --types=all wouldn't need to edit their init scripts.

[apteryks]

The commit had a small follow-up for the doc: systemd/systemd@b1cfc95