documentation

Pull request #2235: Feature/ZBX-23960 7.0 D c5

Merge in WEB/documentation from feature/ZBX-23960-7.0-D-c5 to release/7.0

* commit 'a18e692689d3d206a3dcd247af6470540e1159df':
  ZBX-23960 corrected available choices.
  ZBX-23960 the description of the "Message" column has been clarified.
  ZBX-23960 fixed broken link.
  ZBX-23960 corrected available choices,