Ability to Request for Client Authentication when using NIO SSL in server mode

It would be great if the SSLIOSession.initialize() could expect to know if client authentication is wanted, required or not-wanted through a parameter passed in, when operating in the server mode to configure the underlying SSLEngine.

This maybe something like the Apache SSLClientAuth directive that could be set into the HttpParams as none/required/optional, and passed in by the SSLServerIOEventDispatch