The "/forumpost" page:

Show a single forum posting. The posting is shown in context with
it's entire thread.  The selected posting is enclosed within
<div class='forumSel'>...</div>.  Javascript is used to move the
selected posting into view after the page loads.

Query parameters:

  name=X        REQUIRED.  The hash of the post to display
  t=MODE        Display mode.
                  'c' for chronological
                  'h' for hierarchical
                  'a' for automatic
                  'r' for raw
                  'y' for history of post X only
  raw           If present, show only the post specified and
                show its original unformatted source text.