fs-uae-arcade download folder not browsable on server

[glaubitz]

Unlike the download folders for fs-uae and fs-uae-launcher, the download folder for fs-uae-arcade is not browsable:

https://fs-uae.net/files/FS-UAE/Stable/ https://fs-uae.net/files/FS-UAE-Launcher/Stable/

and:

https://fs-uae.net/files/FS-UAE-Arcade/Stable/

This breaks Debian's watch mechanism which regularly checks for new upstream versions:

https://tracker.debian.org/pkg/fs-uae-arcade

 Problems while searching for a new upstream version high
uscan had problems while searching for a new upstream version:

In watch file debian/watch, reading webpage
  https://fs-uae.net/files/FS-UAE-Arcade/Stable/ failed: 403 Forbidden