contributing.md: Add developer certificate of origin stuff

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/docs/contributing.md b/docs/contributing.md
index a2807bc..5e93f04 100644
--- a/docs/contributing.md
+++ b/docs/contributing.md
@@ -23,3 +23,44 @@ patches to brendan.le.foll@intel.com.
 - Try to split commits up logically, you will be asked to rebase them if they
   are not.
 - Try to stick to the established coding style reguardless of your personal feeling for it!
+
+Code signing
+============
+
+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.  The rules are pretty simple: if you can 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.
+
+then you just add a line saying
+
+	Signed-off-by: Random J Developer <random@developer.example.org>
+
+using your real name (sorry, no pseudonyms or anonymous contributions.)
+Unsigned commits will not be accepted.