launch: make --config-file a commandline argument
launch: make --config-file a commandline argument

This was not fully hooked-up. Rename from policyfile to configfile internally,
as that is a more accurate description.

Signed-off-by: Tom Gundersen <7c8224529a7c718e876cb2496c973509fde1e50e@jklm.no>

bus1/dbus-broker