Implementation of a switching response wrapper to turn output on and off according to the JSF spec 2.0.
Implemented as HttpServletResponseWrapper, so that the switching does not interfere with methods that expect a HttpServletResponse when invoking ExternalContext.getResponse().
@author Werner Punz (latest modification by $Author: lu4242 $)
@author Jakob Korherr
@version $Revision: 1151677 $ $Date: 2011-07-28 02:03:59 +0200 (Thu, 28 Jul 2011) $