Configuration of JSON Web Token (JWT) signing secrets in the `app.ini` file has been unified: `[pfx]SIGNING_ALGORITHM` determines the algorithm, `[pfx]SECRET` is a literal secret for symmetric algorithms, `[pfx]SECRET_URI` is the `file:` uri of a secret for symmetric algorithms `[pfx]SIGNING_PRIVATE_KEY_FILE` is the file with a private key for asymmetric algorithms. For the following configuration keys, the existing behavior is preserved: `[oauth2]` pfx = `JWT_`, `[actions]` pfx = `ID_TOKEN_` only supports asymmetric algorithms. `[server]` pfx = `LFS_JWT_` gained support for asymmetric algorithms. For consistency with `[pfx]SIGNING_PRIVATE_KEY_FILE`, `[pfx]SECRET_URI` now also accepts relative paths.
