Prep for fsverity, where I want to create a new group `[fsverity]` in the keyfile that has default values. We should treat the absence of a group the same as absence of a key in these "with defaults" APIs.
Prep for fsverity, where I want to create a new group `[fsverity]` in the keyfile that has default values. We should treat the absence of a group the same as absence of a key in these "with defaults" APIs.