Web application filtering classloader documentation update

Following a posting on here last year that described using the filtering classloader within a web application, several folks commented that it wasn't described in the documentation.

The WebLogic Server 12c (12.1.1.0) documentation shows the prefer-application-packages and prefer-application-resources elements as being available in the weblogic.xml file.

http://docs.oracle.com/cd/E24329_01/web.1211/e21049/weblogic_xml.htm#autoId24

The WebLogic Server 11g (10.3.6.0) documentation should also include this when it gets pushed out to OTN.

<wls:weblogic-web-app>
     <wls:weblogic-version>12.1.1</wls:weblogic-version>
     <wls:context-root>FilterWeb</wls:context-root>
     <wls:container-descriptor>
         <wls:prefer-application-packages>
             <wls:package-name>com.oracle.foo</wls:package-name>
         </wls:prefer-application-packages>
     </wls:container-descriptor>
</wls:weblogic-web-app>