treewide: Change URLs to HTTPS

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

pkgs/development/compilers/ghcjs-ng/ghcjs-base.nix

@@ -23,7 +23,7 @@ mkDerivation {
     primitive QuickCheck quickcheck-unicode random test-framework
     test-framework-hunit test-framework-quickcheck2 text
   ];
-  homepage = "http://github.com/ghcjs/ghcjs-base";
+  homepage = "https://github.com/ghcjs/ghcjs-base";
   description = "base library for GHCJS";
   license = stdenv.lib.licenses.mit;
 }