UPDATE_URL in ThinLinc Client configuration points to our website, which might not be desirable for various reasons.
One example could be due to DNS problems, which can lead to
some clients stalling for a brief period of time, while waiting for timeout.
To clarify, the issue is that we rely on our main web page to handle client updates. Currently, that isn't a problem in practice, but in the future we might have conflicting needs for our web page and client updates.
So to be proactive, let's change the URL to something that allows us to split things.
*** Bug 5494 has been marked as a duplicate of this bug. ***