[PATCH] posix: New function posix_spawn_file_actions_addchdir_np [BZ #17405]

[Florian Weimer]

* Carlos O'Donell:

> On 10/26/18 10:07 AM, Florian Weimer wrote:
>> I'm not adding documentation in this patch because none exists for the
>> posix_spawn functionality.
>
> We can do better though, I'm happy even if we just add the prototypes
> into the manual to give others a place to hang more text in the future.
> The safety notes would be helpful too, is it MT-safe, AS-safe etc.
>
> Would you please take a stab at adding something minimal?

I don't want to make *any* changes to the manual at this point, sorry.

Thanks,
Florian