* See what it looks like to replace "master key" with "root key". There are two places that would require more challenging code changes: the storage path `core/master`, and its contents (the JSON-serialized EncodedKeyringtructure.)
* Restore accidentally deleted line
* Add changelog
* Update root->recovery
* Fix test
Co-authored-by: Nick Cabatoff <ncabatoff@hashicorp.com>