bug#21305: 25.0.50; `get-buffer-window-list' doc - what order?

[Drew Adams <drew.adams@oracle.com>]

>  > But as one user I'm disappointed.  I was hoping for a usable
>  > window order.  In fact, I was hoping for something similar to
>  > `buffer-list' - hoping that users would get a list of the windows
>  > (displaying a particular buffer) in order of their last use.
>  >
>  > I know no way to obtain such a list, but if there is one, please
>  > be so kind as to let me know.  `walk-windows' etc. go through
>  > windows in their "structural" order, but how can I tell, given
>  > a list of windows showing a given buffer, which were last used
>  > after which others?
>  >
>  > Yes, my question is outside the scope of this bug (if the list
>  > `get-buffer-window-list' has no order we can depend on or even
>  > if its order is unrelated to the chronological order of access).
> 
> I suppose you mean that we should document `window-use-time' too.
> Correct?

Oh, yes; please do.  I was unaware of it.  I can map that over 
`get-buffer-window-list' or otherwise filter that list wrt use time.
Very good.  Thx.  Somehow, I wasn't able to find this, which was
for me a missing piece.