Ensure db paths are backwards compatible #2843
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Issue Addressed
N/A
Proposed Changes
#2682 fixed a bug where providing a relative path for datadir resulted in the datadir db paths being created relative to the home directory. However, as @paulhauner noted in the PR, this would be a backwards incompatible change for users relying on the bug knowingly or unknowingly.
This PR ensures backwards compatibility by keeping the db in the same place as before for users relying on the bug.
If there is no db in the existing location, then it will behave as expected (create a directory relative to the current path).