The format had a stray colon and space included. While fixing that, also
updating the error message to clarify the error happened while parsing
the file (not so much "loading" it).
Before:
WARNING: Error loading config file: /root/.docker/config.json: : json: cannot unmarshal bool into Go struct field ConfigFile.features of type string
After:
WARNING: Error parsing config file (/root/.docker/config.json): json: cannot unmarshal bool into Go struct field ConfigFile.features of type string
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>