* bus/config-parser.c: Load up the BusPolicy and BusPolicyRules

	* dbus/dbus-sysdeps.c (_dbus_get_user_id): new function

	* bus/policy.c (bus_policy_append_mandatory_rule)
	(bus_policy_append_default_rule, bus_policy_append_user_rule)
	(bus_policy_append_group_rule): new functions