* dbus/dbus-string.c (_dbus_string_get_length): New
	function, writes DBusString to C buffer.

	* dbus/dbus-string.h: Prototype it.

	* dbus/dbus-message.c (dbus_message_type_to_string): New
	function, converts message type into C string.

	* dbus/dbus-message.h: Prototype it.

	* bus/selinux.c (bus_selinux_check): Take source pid,
	target pid, and audit data.  Pass audit data to
	avc_has_perm.
	(log_audit_callback): New function, appends extra
	audit information.
	(bus_selinux_allows_acquire_service): Also take
	service name, add it to audit data.
	(bus_selinux_allows_send): Also take message
	type, interface, method member, error name,
	and destination, and add them to audit data.
	(log_cb): Initialize func_audit.

	* bus/selinux.h (bus_selinux_allows_acquire_service)
	(bus_selinux_allows_send): Update prototypes

	* bus/services.c (bus_registry_acquire_service): Pass
	service name to bus_selinux_allows_acquire_service.

	* bus/bus.c (bus_context_check_security_policy): Pass
	additional audit data.  Move assignment of dest
	to its own line.