Consider option for DCO

[stp-ip]

Is this a BUG REPORT or FEATURE REQUEST?:
feature

What happened:
Currently a CLA is used, but various projects moved or are moving to a DCO.
Linux Kernel, Gitlab, Chef etc.

What you expected to happen:
Support or at least consideration of DCOs.

Anything else we need to know?:
Some resources on DCOs:
https://julien.ponge.org/blog/developer-certificate-of-origin-versus-contributor-license-agreements/
https://blog.chef.io/2016/09/19/introducing-developer-certificate-of-origin/
https://about.gitlab.com/2017/11/01/gitlab-switches-to-dco-license/