Very important to point out exactly where this is available and where
  it is not, since TraceEnable extended is likely to be used to confirm
  behavior between differing types of servers, including 1.3/2.0/2.2


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@290733 13f79535-47bb-0310-9956-ffa450edef68