Jeremy White authored May 23, 2020 and Frediano Ziglio committed May 23, 2020

This makes it more user friendly and enables it to run from
an installed location, rather than just the source tree.

This also adds the ability to add '--query hostname' which
will query an XDMCP server for a session, rather than relying
on xinit.

Acked-by: Frediano Ziglio <fziglio@redhat.com>