This looks good now. Just one minor point but I don't think it requires
a resend.
Michał Kiedrowicz wrote:
>
> + { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
> + "descend at most <depth> levels", PARSE_OPT_NONEG,
> + NULL, 1 },
This NULL and 1 are not needed unless you're using PARSE_OPT_OPTARG. I
think this last line can be safely removed.
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