Created an additional, per-directory setting item "AddRadiusCallingStationID", that will set a custom value for the calling station ID attribute. If unset, default behavior (using the client's IP address) will be enforced. Modified example httpd.conf and README to explain patch.
Remove irrelevant text from the README file

If people want to see justifications they can look at the original
commit, but they're not needed for using the module.

The point of the commit log is to track contributions as much as
to aid version control. Inserting patch author names into documents
is not appropriate.