All contributions have to be submitted under the Eclipse Public License v1.0. See also the LICENSE file.
The sign-off is a simple line at the end of the explanation for the patch, which certifies that you wrote it or otherwise have the right to pass it on as an open-source patch.
With the Signed-off-by line you certify the below:
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
If you can certify the above, just add a line stating the following at the bottom of each of your commit messages:
Signed-off-by: Random Developer <random@developer.example.org>
Please use your real name and a valid e-mail address (no pseudonyms or anonymous contributions).
The preferred way is to create GitHub pull requests for your code contributions. Please create separate pull requests for each logical enhancement, new feature, or fix.