I wonder whether SICS needs to be mentioned here, unless you are copying this from some older implementation that beard the SICS copyright, as the [LICENSE file](https://github.com/contiki-os/contiki/blob/master/LICENSE#L10) had recently been updated... @adamdunkels @nvt @fros4943 should this be made more clear in [the guide](https://github.com/contiki-os/contiki/wiki/Code-Contributions)?