SerialFactory breaks Portlet bridge

There is code in StartupServletContextListener that initializes the SerialFactory. Since portlets don't use the StartupServletContextListener, this never gets initialized and results in a NullPointerException.

See:
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=93223
http://wiki.apache.org/myfaces/PortletSerialFactoryWorkaround

The handleSerialFactory() method should be in the FacesConfigurator instead of StartupServletContextListener. You can get the init params via ExternalContext.getInitParameter() instead of ServletContext.getInitParameter().