Lots of URLs were HTTP redirect to HTTPS. Changed those and checked them if there's actual content. Inspired by https://github.com/NixOS/nixpkgs/issues/60004
While it's possible to build on darwin, we never had a successful build. Undefined symbols for architecture x86_64: "sf::microseconds(long long)", referenced from: _sfSleep in Sleep.cpp.o /cc ZHF #45961