For a rationale as to why this was done, please see

* https://grafana.com/blog/2021/04/20/grafana-loki-tempo-relicensing-to-agplv3/
* https://grafana.com/blog/2021/04/20/qa-with-our-ceo-on-relicensing/



Signed-off-by: Richard Hartmann <richih@richih.org>
Signed-off-by: Edward Welch <edward.welch@grafana.com>