* dbus/dbus-connection.c (dbus_connection_get_is_authenticated):
	new function

	* dbus/dbus-server.c (dbus_server_set_max_connections)
	(dbus_server_get_max_connections, dbus_server_get_n_connections):
	keep track of current number of connections, and add API for
	setting a max (but haven't implemented enforcing the max yet)