Treewide: use HTTPS on NonGNU domains

pkgs/tools/graphics/fim/default.nix

@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
       to be a highly customizable and scriptable for users who are comfortable
       with software like the VIM text editor or the Mutt mail user agent.
     '';
-    homepage = http://www.nongnu.org/fbi-improved/;
+    homepage = https://www.nongnu.org/fbi-improved/;
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = with maintainers; [ primeos ];

pkgs/tools/graphics/icoutils/default.nix

@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = http://www.nongnu.org/icoutils/;
+    homepage = https://www.nongnu.org/icoutils/;
     description = "Set of programs to deal with Microsoft Windows(R) icon and cursor files";
     license = stdenv.lib.licenses.gpl3Plus;
     platforms = with stdenv.lib.platforms; linux ++ darwin;