documentation

Pull request #1307: Feature/ZBX-20154 7.0 D

Merge in WEB/documentation from feature/ZBX-20154-7.0-D to release/7.0

* commit '0e2bb7f2829a2ef3bc915f40131988be1d2d51fc':
  ZBX-20154-7.0 corrected
  ZBX-20154-7.0 markdown corrected
  ZBX-20154-7.0 description of Include parameter