Perfer client.conf over X11 property variables.

Perfer client.conf over X11 property variables.
To explain: X11 properties are always set on the root window if pulseaudio is started
during X11 login (which is the most likey time to start it). This means that any settings
specified in client.conf will almost never be used. As the default client.conf is empty
it makes more sense to listen to it if a user cares to bother altering it.

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2494 fefdeb5f-60dc-0310-8127-8f9354f1896f