adtool: mark broken
adtool: mark broken

Broke when updating OpenLDAP>2.5 and has not seen a change since 2017,
which is at this point 5y in the past.

I think it's safe to say that this tool deserves to being marked broken.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs