Treewide: use HTTPS on GNU Savannah domains

HTTP -> HTTPS for:
- http://savannah.gnu.org/
- http://git.savannah.gnu.org/
- http://download.savannah.gnu.org/
- http://svn.savannah.gnu.org/

pkgs/development/libraries/gnu-config/default.nix

@@ -5,11 +5,11 @@ let
 
   # Don't use fetchgit as this is needed during Aarch64 bootstrapping
   configGuess = fetchurl {
-    url = "http://git.savannah.gnu.org/cgit/config.git/plain/config.guess?id=${rev}";
+    url = "https://git.savannah.gnu.org/cgit/config.git/plain/config.guess?id=${rev}";
     sha256 = "1bb8z1wzjs81p9qrvji4bc2a8zyxjinz90k8xq7sxxdp6zrmq1sv";
   };
   configSub = fetchurl {
-    url = "http://git.savannah.gnu.org/cgit/config.git/plain/config.sub?id=${rev}";
+    url = "https://git.savannah.gnu.org/cgit/config.git/plain/config.sub?id=${rev}";
     sha256 = "00dn5i2cp4iqap5vr368r5ifrgcjfq5pr97i4dkkdbha1han5hsc";
   };
 in
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Attempt to guess a canonical system name";
-    homepage = http://savannah.gnu.org/projects/config;
+    homepage = https://savannah.gnu.org/projects/config;
     license = licenses.gpl3;
     # In addition to GPLv3:
     #   As a special exception to the GNU General Public License, if you