File change notifications

[Duane Clark]

Hans Leidekker wrote:
> +
> +/* TODO: - security attribute changes
> + *       - compound filter and multiple notifications
> + *       - subtree notifications
> + *       - non-documented flags FILE_NOTIFY_CHANGE_LAST_ACCESS and
> + *         FILE_NOTIFY_CHANGE_CREATION
> +

For some reason, a comment end is missing there. But otherwise, it seems 
to work fine with the one important app I use file notification on.