Adds private server.

jvb/rootfs/defaults/jvb.conf

@@ -42,6 +42,9 @@ videobridge {
         server-id = "{{ $WS_SERVER_ID }}"
     }
     http-servers {
+        private { 
+          host = 0.0.0.0
+        }
         public {
             host = 0.0.0.0
             port = 9090