config/disk-log-message-filelog.json contained trailing commas and no
trailing newline, so it could not be parsed by encoding/json and NPD
would fail to start when configured with it.
- Fix the invalid JSON
- Add TestShippedConfigs, which verifies that every shipped JSON config
under config/ (top level and one directory down) parses (catching
trailing commas, UTF-8 BOMs and other syntax errors) and is in the
canonical format (2-space indent, trailing newline), showing a diff on
failure
- Add `make fmt-configs` to rewrite nonconforming files in place
(UPDATE_EXPECTED=y)
- Normalize the existing config files to the canonical format
(whitespace-only changes)
Ciprian Hacman
tashen