seatd: add meta.mainProgram

+1
+1
pkgs/applications/misc/seatd/default.nix
··· 47 license = lib.licenses.mit; 48 maintainers = with lib.maintainers; [ emantor ]; 49 platforms = with lib.platforms; freebsd ++ linux ++ netbsd; 50 }; 51 })
··· 47 license = lib.licenses.mit; 48 maintainers = with lib.maintainers; [ emantor ]; 49 platforms = with lib.platforms; freebsd ++ linux ++ netbsd; 50 + mainProgram = "seatd"; 51 }; 52 })