paperkey: use HTTPS

pkgs/tools/security/paperkey/default.nix

@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "1.6";
 
   src = fetchurl {
-    url = "http://www.jabberwocky.com/software/paperkey/${name}.tar.gz";
+    url = "https://www.jabberwocky.com/software/paperkey/${name}.tar.gz";
     sha256 = "1xq5gni6gksjkd5avg0zpd73vsr97appksfx0gx2m38s4w9zsid2";
   };
 
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
       retention qualities - far longer than the magnetic or optical means that
       are generally used to back up computer data.
     '';
-    homepage = http://www.jabberwocky.com/software/paperkey/;
+    homepage = "https://www.jabberwocky.com/software/paperkey/";
     license = licenses.gpl2;
     platforms = platforms.unix;
     maintainers = with maintainers; [ skeidel ];