the very slight speedup in config setting access is not worth the
maintenance overhead of conflating concers like this. the virtual
inheritance scheme used for configs requires too much duplication
of base class constructor arguments to be worth doing. perhaps we
should get rid of all virtual inheritance of data-membered bases?
Change-Id: I4acf5ceaedb4ed7476efe1114c2e065ec72d2c6d
eldritch horrors
95a9a4cece