{ C(channel), &type_string, validate_channel },
{ C(checkpoint_kbyte), &type_integer, validate_non_negative },
{ C(checkpoint_min), &type_integer, validate_non_negative },
{ C(channel), &type_string, validate_channel },
{ C(checkpoint_kbyte), &type_integer, validate_non_negative },
{ C(checkpoint_min), &type_integer, validate_non_negative },