Treewide: update some problematic homepages

These URLs are reported as problematic by Repology.
It could be a permanent redirection
or the page does not exist anymore

pkgs/development/perl-modules/Mozilla-LDAP/default.nix

@@ -12,6 +12,7 @@ buildPerlPackage rec {
   };
   meta = {
     description = "Mozilla's ldap client library";
+    homepage = "https://metacpan.org/release/perldap";
     license = with lib.licenses; [ mpl20 lgpl21Plus gpl2Plus ];
   };
 }