Support for new instruction format, dependency on Apache commons

guacamole-common/src/main/java/net/sourceforge/guacamole/servlet/GuacamoleTunnelServlet.java

@@ -221,7 +221,7 @@ public abstract class GuacamoleTunnelServlet extends HttpServlet {
                 tunnel.close();
             
             // End-of-instructions marker
-            out.write(';');
+            out.write("0.;");
             out.flush();
             response.flushBuffer();