8d6bceb5 refactored version/help to operate more like regular commands in part to simplify the implementation of --version and --help. Unfortunately this had the side effect of these commands also loading pgbackrest.conf which would lead to an error if the file could not be read or parsed.
Add a filter to prevent version or help from loading pgbackrest.conf. Also prevent reads from the env to stop any warnings or errors from that source.
c9c73ede9d