[m-rev.] for review: Replace GNU getopt implementation with ya_getopt.

[Peter Wang]

On Sun,  2 Jun 2019 11:21:01 +1000, Peter Wang <novalazy at gmail.com> wrote:
> Assuming ya_getopt is fine, I intend to:
>   - add the files ya_getopt/getopt.[ch], ya_getopt/README.md
>   - apply the following patch
>   - delete runtime/GETOPT

After some testing yesterday, I was able to find a couple of bugs in
ya_getopt, suggesting the code is not as mature as we'd like.
Therefore I'm retracting my suggestion for ya_getopt at this time.

Peter