dechunk filter:

  Get rid of an assertion which assumed that HTTP_IN is the filter
  below us.  Some other filter may play the same role.
ap_setup_client_block():
  Get rid of a commented-out hack which was used to allow chunked
  transport encoding of a request body received by mod_cgi[d].
ap_get_client_block():
  Get rid of special handling for zero-length buckets...  The main
  loop handles that fine.
Submitted by:	Ryan Bloom


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86614 13f79535-47bb-0310-9956-ffa450edef68