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: 933725 $ $Date: 2010-04-13 13:07:04 -0500 (Tue, 13 Apr 2010) $