[CentOS] /etc/hosts - hostname alias for 127.0.0.1

> (Make sure you pick .dummy so as not to interfere with any other DNS.)
>
> In theory you could leave off .dummy, but then you risk hostname being
> completed with the search domain in resolv.conf, which creates the
> problems already mentioned with putting hostname.domain.com in
> /etc/hosts.  (I have not tested this at all!)

I will probably just leave this decision to the application
architects, with the recommendation that we should simply use DNS as
intended...