bug#12881: Assume at least POSIX.1-1988 for fcntl.h

[Stefan Monnier]

> But as for Eli's comment, he's quite right in saying that, when things
> break, he's the only one to fix them.  Many of the recent changes that
> have broken Windows need to be fixed by someone who's not only
> well-versed on Windows development, but also POSIX.  Unfortunately the
> number of people with that skill set is tiny among Emacs developers,
> I think.

Yes, indeed.  I find it a bit scary, actually,


        Stefan