[PATCH] Use ngx_socket_errno where appropriate.

[Ruslan Ermilov]

On Mon, Feb 03, 2014 at 02:22:39PM -0800, Piotr Sikora wrote:
> Hey,
> 
> > Note that I still agree with Ruslan's comments to your patch, use
> > of ngx_socket_errno to check errors from ioctl() / fcntl() in
> > unix-specific code looks unneeded.  And in case of eventfd - it
> > looks certainly wrong, as eventfd isn't a socket.
> >
> > I would rather drop most of the src/os/unix changes, probably with
> > the exception of ngx_tcp_nopush() checks.
> 
> Done.

Your latest patch looks good to me.