documentation

Pull request #2980: Feature/DEV-4394 7.4 D

Merge in WEB/documentation from feature/DEV-4394-7.4-D to release/7.4

* commit '3a7ae2c76ecde683b815266a5bd1cf8a2b4c3648':
  DEV-4394 fixed a codeblock.
  DEV-4394 removed redundant spaces.
  DEV-4394 added info about ha.
  DEV-4394 comment block test.
  DEV-4394 Fixed comment block.
  DEV-4394 added more links, fixed formatting, added missing entry.
  DEV-4394 added a link.
  DEV-4394 added links.
  DEV-4394 minor fixes.
  Dev-4394 added a table, formatting.
  DEV-4394 initial draft.