* User idle timeout

* Only allow one session per user at a time
* user 'timestamp' property -> 'account_created'
* Better User.getLegacySecurityLevel() using group membership
* Client connection management -> client_connections.js
* Minor changes & cleanup

core/client_connections.js

@@ -0,0 +1,57 @@
+/* jslint node: true */
+'use strict';
+
+var logger						= require('./logger.js');
+
+exports.addNewClient			= addNewClient;
+exports.removeClient			= removeClient;
+
+var clientConnections = [];
+exports.clientConnections		= clientConnections;
+
+function addNewClient(client) {
+	var id = client.runtime.id = clientConnections.push(client) - 1;
+
+	//	Create a client specific logger 
+	client.log = logger.log.child( { clientId : id } );
+
+	var connInfo = { ip : client.input.remoteAddress };
+
+	if(client.log.debug()) {
+		connInfo.port		= client.input.localPort;
+		connInfo.family		= client.input.localFamily;
+	}
+
+	client.log.info(connInfo, 'Client connected');
+
+	return id;
+}
+
+function removeClient(client) {
+	client.end();
+
+	var i = clientConnections.indexOf(client);
+	if(i > -1) {
+		clientConnections.splice(i, 1);
+		
+		logger.log.info(
+			{ 
+				connectionCount	: clientConnections.length,
+				clientId		: client.runtime.id 
+			}, 
+			'Client disconnected'
+			);
+	}
+}
+
+/* :TODO: make a public API elsewhere
+function getActiveClientInformation() {
+	var info = {};
+
+	clientConnections.forEach(function connEntry(cc) {
+
+	});
+
+	return info;
+}
+*/