bug#23068: 25.1.50; unix socket address in abstract namespace

[Eli Zaretskii]

> From: Mark Oteiza <mvoteiza@udel.edu>
> Date: Sat, 19 Mar 2016 23:18:35 -0400
> 
> For the wishlist: teach emacs how to handle unix domain sockets with
> an abstract address.  For instance, connecting to an abstract address
> might look like:
> 
>   (make-network-process
>    :name "dog" :buffer " *woof*"
>    :service "\0sock" :family 'local)
> 
> the salient part being that the first element of the address is a null
> byte. unix(7) has details.

Which parts of this don't already work?