documentation

Pull request #2780: feature/ZBXNEXT-9927-7.0-D. secret macro resolution (when referenced indirectly); added LLD rule fields to unmasked locations for secret user macros.

Merge in WEB/documentation from feature/ZBXNEXT-9927-7.0-D to release/7.0

* commit 'd248b27ee5b8b5dbd3cf18031442e8326e8de5a0':
  [ZBXNEXT-9927] secret macro resolution (when referenced indirectly)
  [ZBXNEXT-9927] secret macro resolution (when referenced indirectly)
  [ZBXNEXT-9927] added LLD rule fields to unmasked locations for secret user macros