Fixed inclusion from developercertificate.org.
@@ -57,12 +57,12 @@ By signing off your `git` commits, you agree that you can certify
what stated by the Developer Certificate of Origin.
That is enough for the CometD project to accept your contribution.
-The Developer Certificate of Origin (from http://developercertificate.org/):
+The Developer Certificate of Origin (from https://developercertificate.org/):
====
[source,text]
----
-include::http://developercertificate.org/[lines=14..49]
+include::https://developercertificate.org/[lines=14..50]
----
====
