EAP6 is unable to supress x-powered-by for JSF application

Issue

• Even after following the KCS Article: [0], While running JSP2 based application it is noticed that even if the following configuration is specified inside the "web" subsystem of EAP6 still it shows the "X-Powered-By" header in the Response.

            <configuration>
                <jsp-configuration x-powered-by="false"/>
            </configuration>

• Even with the above configuration when a request is sent to the JSF based application then the HTTPResponse is sent by JBoss with the "X-Powered-By" header.

http://10.65.209.189:8080/EE6_BeanValidationDemo/welcome.jsf

GET /EE6_BeanValidationDemo/welcome.jsf HTTP/1.1
Host: 10.65.209.189:8080
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.11) Gecko/20121116 Firefox/10.0.11
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
X-Powered-By: JSF/2.0
Set-Cookie: JSESSIONID=uDMZ5maS4UuqgydzNR1k6RIr; Path=/EE6_BeanValidationDemo
Content-Type: text/html;charset=UTF-8
Content-Length: 515
Date: Fri, 17 May 2013 13:03:22 GMT

• [0] "Suppress or Modify Server Name and X-Powered-By headers from EAP6"