t1utils: improve meta.license

Replace stringy license with attrset.

Ref https://github.com/NixOS/nixpkgs/issues/269788

pkgs/tools/misc/t1utils/default.nix

@@ -20,9 +20,12 @@ stdenv.mkDerivation rec {
       file from a PFA or PFB font.
     '';
     homepage = "https://www.lcdf.org/type/";
-    # README from tarball says "BSD-like" and points to non-existing LICENSE
-    # file...
-    license = "Click"; # MIT with extra clause, https://github.com/kohler/t1utils/blob/master/LICENSE
+    license = {
+      shortName = "Click"; # README.md says BSD-like, see LICENSE
+      url = "https://github.com/kohler/t1utils/blob/master/LICENSE";
+      free = true;
+      redistributable = true;
+    };
     platforms = platforms.all;
     maintainers = [ maintainers.bjornfor ];
   };