check_executable("gpg", $CONFIG{'gpg'});
check_executable("gpg-sign", $CONFIG{'gpg-sign'});
check_executable("gpg-delsig", $CONFIG{'gpg-delsig'});
check_executable("gpg", $CONFIG{'gpg'});
check_executable("gpg-sign", $CONFIG{'gpg-sign'});
check_executable("gpg-delsig", $CONFIG{'gpg-delsig'});