The CONTRIBUTING.md requests an (or multiple) SPDX identifier for GPL licenses. But a lot of packages did use a different, non-SPDX style with a "+" at the end instead of "-or-later". Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>