keybase_service_base: Add checks for calls to config.MDServer() to avoid panics in races with doInit.
keybase_service_base: Add checks for calls to config.MDServer() to avoid panics in races with doInit.

keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client