The OnTimeout event occurs after the client has has exceeded
the maximum allowed idle time, and immediately before the client is
disconnected from the server. This event will never
occur during a file transfer or directory listing.
To change the default idle timeout period for all clients, set the
IdleTime property prior to starting the server. To set the idle
timeout period for a specific client, set the ClientIdle
property in an OnConnect or OnLogin event handler.