dokan: Add ErrNotADirectory and Returning{File,Dir}Allowed
dokan: Add ErrNotADirectory and Returning{File,Dir}Allowed

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