documentation

Pull request #2917: Feature/ZBX-26561 7.0 D

Merge in WEB/documentation from feature/ZBX-26561-7.0-D to release/7.0

* commit 'c8fb95f1dee25d2a0e03b2bc4657fbc10a87832b':
  ZBX-26561 formatting.
  ZBX-26561 fixed a link.
  ZBX-26561 list adjustment, added a link.
  ZBX-26561 added links.
  ZBX-26561 clarified information about omission of the host name.