* Also allow overriding `RENDERD_STATS` (defaults to `/run/renderd/renderd.stats`)
* Also allow overriding `REPLICATION_STATE` (defaults to `/home/osm/replicate/state.txt`)
For linting `CMakeLists.txt` & `*.cmake` files (`cmakelint`) as well as various other formats such as `HTML`, `MarkDown` & `YAML` (`prettier`.)
### Also:
* Upgrade `actions/checkout` from `v3` to `v4`
* Output coverage summary to GitHub Job step summary
* Minor build docs cleanup for `CentOS` & `FreeBSD`
* Added the possibility to provide ImageIO's output format in the TYPE string.
For instance:
TYPE=png image/png
TYPE=png image/png png256
TYPE=png image/png png24
TYPE=png image/png png
* Removed useless comments.
Added documentation for output format.
* Added tests for 'webp' output format
* Also added tests for 'png32' output format
* Fix 'webp' sums vary based on version
* Add JPG & use multiple layers on example-map
---------
Co-authored-by: Tim <autintim@gmail.com>