Make the contributing document link to how to create a changelog rather
than just linking to the Changelog itself. Backport to 2.16
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
The Mbed TLS project no longer requires a CLA. Contributions from now on
must be made under both Apache-2.0 AND GPL-2.0-or-later licenses, to enable
LTS (Long Term Support) branches of the software to continue to be provided
under either Apache-2.0 OR GPL-2.0-or-later. Contributors must accept the
terms of the Developer Certificate of Origin (DCO) by adding a Signed-off-by:
line to each commit message.
The software on the development branch continues to be provided under
Apache-2.0.
Update README.md, CONTRIBUTING.md and pull_request_template.md to explain
the new licensing model. Add a copy of the DCO to the project.
Signed-off-by: Dan Handley <dan.handley@arm.com>
Added a section on API/ABI compatibility on the development branch to the
CONTRIBUTING.md guidelines. Also added to the testing section, refined the LTS
section and changed some formatting for consistency.
The CONTRIBUTING.md referred to 'legacy' branches instead of LTS branches, and
also referenced mbedtls-1.3 which is no longer maintained, and omitted
mbedtls-2.7 which is.
