[PRQ#40993] Merge Request for widelands-maps-rttr

dreieck [1] filed a request to merge widelands-maps-rttr [2] into widelands-maps-rttr-localver [3]: `$pkgname` sanitisation. [1] https://aur.archlinux.org/account/dreieck/ [2] https://aur.archlinux.org/pkgbase/widelands-maps-rttr/ [3] https://aur.archlinux.org/pkgbase/widelands-maps-rttr-localver/