- explicitly remove unneeded polkit pkexec file (bsc#1194300).

- update to 3.0:
- remove need for debugfs/usbdevfs/usbfs file entirely, rely only on
sysfs now. This removes the need to run the program as root, which
should have never happened.
- added SPDX identifiers and .spdx file to make packaging easier for
others.

- update to 2.2:
- security issue fixed with polkit (CVE-2022-23220 bsc#1194300).
- copyright year fixups and updates
- tooltip added to explain red devices have no attached drivers

- update to 2.1:
- build warnings fixed
- increased max number of interfaces allowed, fixing problem with some
USB sound devices.
- autogen.sh added
- LICENSES directory added and license moved to it
- SPDX license headers added
- policykit support added