serializable configuration

Hi,

I would need to make the configuration serializable to implement a cache with a disk persistence. Could you please implements/extends Serializable for the following classes/interfaces?

com.opensymphony.xwork.config.entities.PackageConfig
com.opensymphony.xwork.config.entities.Parameterizable
com.opensymphony.xwork.config.entities.ResultTypeConfig
com.opensymphony.xwork.config.entities.InterceptorListHolder
com.opensymphony.xwork.interceptor.Interceptor

Also, the following class needs to have its logger static:
com.opensymphony.xwork.interceptor.AroundInterceptor
protected static final Log log = LogFactory.getLog(AroundInterceptor.class);

Thanks a lot,
Stephane