[mythtv] Latest commits have broken UPNP database lookup

[David Hampton]

On Mon, 2017-11-13 at 14:50 -0500, Peter Bennett wrote:
> Start backend, remove the frontend's config.xml and start frontend.
> You 
> need to have them running with different config.xml files (e.g. by 
> running under different user ids or overriding MYTHCONFDIR).
> 
> Correct operation:
> If pin of 0000 was set in mythtv-setup the frontend will
> automatically 
> get the credentials from the backend via UPNP, and create the 
> config.xml. If another pin was used you will see the startup page.
> If 
> you select Search there and select the backend it will prompt for
> the 
> PIN and if you enter it correctly it will be connected.

Will it ask before connecting?  How do I keep my test/master frontend
from finding my 0.28/production backend and attempting to upgrade its
database?  Run both test frontend and backend in a VM so there's no
traffic on my home network?  Unplug the ethernet from my workstation
while testing? :-)  I want to make sure I don't mess up my production
system.

David