[PRQ#40994] Merge Request for widelands-maps-rttr-localver

dreieck [1] filed a request to merge widelands-maps-rttr-localver [2] into widelands-maps-rttr [3]: `$pkgname` sanitisation. Please discard my other merge request which was for the other direction. [1] https://aur.archlinux.org/account/dreieck/ [2] https://aur.archlinux.org/pkgbase/widelands-maps-rttr-localver/ [3] https://aur.archlinux.org/pkgbase/widelands-maps-rttr/