treewide: http -> https sources (#42676)

* treewide: http -> https sources

This updates the source urls of all top-level packages from http to
https where possible.

* buildtorrent: fix url and tab -> spaces

pkgs/applications/graphics/jpegoptim/default.nix

@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   name = "jpegoptim-${version}";
 
   src = fetchurl {
-    url = "http://www.kokkonen.net/tjko/src/${name}.tar.gz";
+    url = "https://www.kokkonen.net/tjko/src/${name}.tar.gz";
     sha256 = "1dss7907fclfl8zsw0bl4qcw0hhz6fqgi3867w0jyfm3q9jfpcc8";
   };