Don't stop with the kernel, extend it to all software projects

Suffering from a coirporate policy that requires a full assessment process for software that contains Open Source components I'm glad to see those SPDX identifiers show up in the kernel. Next step would be to include them as well in all userland software. But yet they are very rare, just download some sources of popular programs and go hunting for SPDX and you won't find much.

If there would be a valid SPDX tag everywhere it would make automation of our ugly process easier. Currently we sometimes invest more effort in the bureaucratic and legally required stuff than in actually developing software.