xorg xinit: use `uname -n` instead of `hostname`

[Alan Coopersmith]

On 9/18/20 5:36 AM, Geert Hendrickx wrote:
> Hi Alan
> 
> 
> Could you take a look at https://gitlab.freedesktop.org/xorg/app/xinit/-/issues/18 ?
> 
> It's a simple portability fix for xorg xinit, allowing Linux users
> to get rid of legacy inetutils (package providing hostname but also
> rlogin/rsh/rcp, talk telnet, and other dinosaurs) on their systems.
> 
> Someone else already made a merge request for this:
> https://gitlab.freedesktop.org/xorg/app/xinit/-/merge_requests/3

I've cc'ed the developer list since I don't know if there are any platforms
this will cause problems for.  (I'm one of the last people to ask about
Linux issues, since I work on Solaris, not Linux.)

-- 
	-Alan Coopersmith-               alan.coopersmith at oracle.com
	 Oracle Solaris Engineering - https://blogs.oracle.com/alanc