master b3d065d: New default icon

[Eli Zaretskii]

> +** Emacs 25 comes with a new set of icons.
> +Various resolutions are available as 
> etc/images/icons/hicolor/*/apps/emacs.png.
> +The old Emacs logo icons are available as `emacs23.png' in the same location.

Could you please explain how to use these?  Or should Emacs pick thise
up automatically?  In that case, the MS-Windows executables still use
nt/icons/emacs.ico, which I imagine needs to be changed, right?

Thanks.