* doc/TODO: remove the "guid" item

	* test/glib/test-profile.c (no_bus_thread_func): use open_private
	(with_bus_thread_func): use open_private

	* dbus/dbus-connection.c (dbus_connection_open_private): new
	function that works like the old dbus_connection_open()
	(dbus_connection_open): now returns an existing connection if
	possible

	* dbus/dbus-server-unix.c (handle_new_client_fd_and_unlock): pass
	through the GUID to the transport

	* dbus/dbus-server.c (_dbus_server_init_base): keep around the
	GUID in hex-encoded form.

	* dbus/dbus-server-debug-pipe.c (_dbus_transport_debug_pipe_new):
	pass GUID argument in to the transport

	* dbus/dbus-transport-unix.c (_dbus_transport_new_for_fd): add
	guid argument

	* dbus/dbus-transport.c (_dbus_transport_init_base): add guid argument

	* dbus/dbus-auth.c (_dbus_auth_server_new): add guid argument