* GHOST is an implementation detail, Blender environment variables should
have the BLENDER_ prefix.
* Don't put links in command line help output. We don't do this for other
arguments either, and it's trivial to search for this online.
* Make description more straightforward and line wrap.
* Use CLOG for logging.
Ref #143049
Pull Request: https://projects.blender.org/blender/blender/pulls/144349
5afe338287