documentation

Pull request #2710: feature/ZBXNEXT-7527-7.3-D. host prototypes on discovered hosts.

Merge in WEB/documentation from feature/ZBXNEXT-7527-7.3-D to release/7.4

* commit 'be3eba82530e2bd5c00bce025acd0ed117bf4528':
  [ZBXNEXT-7527] clarified wording
  [ZBXNEXT-7527] fixed link
  [ZBXNEXT-7527] host prototypes on discovered hosts