Lfun:	notify_enter_container - notify if an item has entered a container

Synopsis:
	notify_enter_container(object container)

Description:
	The notify_enter_container function is called in an item after it has
	entered a container, for example if a player put it into.

Return value: none

Examples:
	object last_container;
	notify_enter_container(con) {
		last_container=con;
	}

See also: object/notify_item_enter, object/notify_item_leave, object/forbid_item_enter, object/forbid_item_leave, object/notify_leave_container, object/forbid_enter_container, object/forbid_leave_container, object/drop, object/get, efun/move_object, efun/transfer