Config version must be specified

Signed-off-by: Ferenc Wágner <wferi@debian.org>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>

conf/corosync.conf.example

@@ -1,5 +1,7 @@
 # Please read the corosync.conf.5 manual page
 totem {
+	version: 2
+
 	# Set name of the cluster
 	cluster_name: ExampleCluster