Merge remote-tracking branch 's-o-b/contributing-github'

* s-o-b/contributing-github:
  CONTRIBUTING.md: Update SubmittingPatches link
  developer-certificate-of-origin: Add v1.1 from the Linux Foundation

Signed-off-by: W. Trevor King <wking@tremily.us>

diff --cc CONTRIBUTING.md
index 034d98d12af2cfb0130d216f3f3a98ffa19d126c,4ac6435d28deb58af269b9c79fc8ac5ddce19eb0..664a32d2b26cd57979a08d79c703f0904684c58a
--- 1/CONTRIBUTING.md
--- 2/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@@ -1,15 -1,9 +1,16 @@@
- This project tracks patch provenance and licensing using the Developer
- Certificate of Origin and Signed-off-by tags initially developed by
- the Linux kernel project.  Because the documentation for this
- procedure is licensed under the GPLv2, we have chosen not to include
- it in our project directly.  Instead, please see
+ This project tracks patch provenance and licensing using the
+ [Developer Certificate of Origin][DCO] and Signed-off-by tags
+ initially developed by the Linux kernel project.  Because the
+ documentation for this procedure is licensed under the GPLv2, we have
+ chosen not to include it in our project directly.  Instead, please see
  [SubmittingPatches][], which is stored in an external repository.
  
- [SubmittingPatches]: https://github.com/wking/signed-off-by/blob/ab5bce80ad2259b47202b28905efff0d04032709/Documentation/SubmittingPatches
 +Rss2email is versioned under the GNU General Public License as
 +published by the Free Software Foundation, either [version 2 of the
 +License][GPLv2], or (at your option) [version 3 of the
 +License][GPLv3].
 +
+ [DCO]: developer-certificate-of-origin
+ [SubmittingPatches]: https://github.com/wking/signed-off-by/blob/7d71be37194df05c349157a2161c7534feaf86a4/Documentation/SubmittingPatches
 +[GPLv2]: https://github.com/wking/rss2email/blob/49f3dfa686a24ec68c6d225aedc3cb4f5b5cedb0/GPLv2
 +[GPLv3]: https://github.com/wking/rss2email/blob/49f3dfa686a24ec68c6d225aedc3cb4f5b5cedb0/GPLv3