issue README: note they are superseded by RFC

Author: birkenfeld

protocol/issues/README.rst

@@ -1,3 +1,14 @@
+Note
+====
+
+SECoP Issues have been replaced by the RFC process, which is described in
+`RFC 1
+<https://github.com/SampleEnvironment/SECoP/blob/master/rfcs/RFC-001-RFC-process.rst>`_.
+
+If there is renewed interest in one of the remaining open issues, please
+migrate to an RFC before restarting discussion.
+
+
 SECoP Issues
 ============