documentation

Pull request #2538: Feature/ZBX-25027 7.2 D

Merge in WEB/documentation from feature/ZBX-25027-7.2-D to release/7.2

* commit '66c6b771050ce8ada53382b94b30b3a7355ea1fb':
  ZBX-25027 fixed a comment block.
  ZBX-25027 moved a note to a new section, note position changes to relevant places.
  ZBX-25027 changed the section name in links.
  ZBX-25027 improved section content.
  ZBX-25027 replace proxy section, note improvements.
  ZBX-25027 moved the created proxy maintenance section, added a link to the note leading to it.
  ZBX-25027 added a missing space.
  ZBX-25027 Improved note position, remade note as a section.
  ZBX-25027 added and edited notes about proxy maintenance.
  ZBX-25027 initial changes.