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: jakobk $)
@author Jakob Korherr
@version $Revision: 939021 $ $Date: 2010-04-28 12:38:25 -0500 (Wed, 28 Apr 2010) $