[arch-general] Dangerous dbus update for testing

[Jan de Groot]

There's a dangerous dbus update coming up for the testing repository.
The package itself isn't so special, as it works fine, but the fact that
every dbus-daemon process on your system will crash during the upgrade
can lead to unpleasant surprises.

Testing users: please be aware of this and run your upcoming upgrades
from a plain text console instead of from X. One of the unpleasant
surprises is that xorg-server in testing goes down with dbus while it's
upgrading, leading to loss of important work or an interrupted package
upgrade process.