launch/config: be more verbose about denied configuration access
launch/config: be more verbose about denied configuration access

Print the configuration path whenever we hit EPERM or EACCES. This makes
it easier to debug mis-configured systems.

Signed-off-by: David Rheinsberg <1e7ff67ac6e6692b085f67edeb10803d9022c525@gmail.com>

bus1/dbus-broker