Restrict by content type and encoding before we go and try to drag in some
  text to merge as headers and footers to autoindex pages.  This will escape
  index.gif from a bold attempt to use IndexHeader index ;)

  Also pass in the args to the subrequest, for anyone trying to decode what
  the user is looking at.  A great example of this coming up.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91609 13f79535-47bb-0310-9956-ffa450edef68