documentation

Pull request #3158: feature/DEV-4429-6.0-D. Added notes on user type-related limitations in configuration.import/export/importcompare.

Merge in WEB/documentation from feature/DEV-4429-6.0-D to release/6.0

* commit '133b85339fe510c0894e0d90966434fd67f2d103':
  [DEV-4429] simplified notes on user type-related limitations in configuration.import/export/importcompare
  [DEV-4429] added notes on user type-related limitations in configuration.import/export/importcompare