Can you specify an activity timeout for Websocket4Net websocket
<p>Opened a websocket using a WebSocket4Net client against a relatively quiet server. After 4 minutes the socket is receiving a close message. After 4 minutes the socket is receiving a close message if no other message activity is received on the socket.</p>

<p>Is there a timeout that is defined in the websocket? I'm trying to determine for certain that the websocket is closing from a timeout as the server has no activity timeout set so would allow the socket to remain connected indefinitely.</p>
