documentation

Pull request #1123: feature/ZBX-22348-6.4-D

Merge in WEB/documentation from feature/ZBX-22348-6.4-D to release/6.4

* commit '112747703ea6194592410a3dd49a6a73e995c79f':
  id added
  user role warnings updated on 3 pages
  user role - creation differences review