Vitals takes contributions under MIT, inbound equal to outbound, with a
Developer Certificate of Origin instead of a CLA. That is the same shape
Nextcloud uses on the project this tool was written to watch, so nobody
contributing here is being asked for paperwork they would not sign
upstream.
tools/check-dco.sh verifies both presence and identity of the sign-off,
and fails the pull request if either is wrong. Tested against three
cases: unsigned, correctly signed, and signed by someone other than the
author.
Signed-off-by: Christian Sass <csass@binaryranch.com>