- Replaced BodyReader with BodyPipe. BodyReader was a

	- Replaced BodyReader with BodyPipe. BodyReader was a
	  collection of function pointers augmented with body size
	  calculation logic. BodyReader was used to deliver request
	  body (of a known size) from the client side to the server
	  side. Reference counting was used to communicate abort
	  conditions to the other side (it did not work well because
	  decreasing the reference count does not have any side-effects
	  if the count remains positive). Direct calls between sides
	  sometimes resulted in a call-me-when-I-am-calling-you "loops"
	  and related bugs.

	  BodyPipe is used to deliver request or response body (possibly
	  of unknown size) from the body producer to the body consumer.
	  A producer can be the client side (for virgin requests), the
	  server side (for virgin replies), or the ICAP side (for
	  adapted messages). A consumer can be the client side (for
	  adapted responses, including responses in a request
	  satisfaction mode), the server side (for adapted requests),
	  and the ICAP side (for virgin requests and responses).

	  BodyPipe uses asynchronous calls for communication between
	  sides to avoid call-me-when-I-am-calling-you "loops".

	  BodyPipe has methods to communicate normal termination and
	  abort conditions to the other side. The use of those methods
	  is mandatory. Reference counting is used only as a garbage
	  collection mechanism.

	  BodyPipe is used to read request bodies, including requests
	  for which there is no consumer and the connection is in a
	  'closing' state. BodyPipe can auto-consume body so that a
	  'closing' connection does not have to rely on the body
	  consumer presence when eating up remaining body data.

	  If auto-consumption is turned on and the pipe starts
	  consuming before a real consumer is attached to the pipe, the
	  setConsumerIfNotLate call fails, and the real consumer has to
	  handle the failure.

	  The new BodyPipe approach should make support for HTTP/1.1
	  chunked requests easier. Only a few places in the pipe-related
	  code assume that the request size is known.

	- Removed ClientBody as unused, replaced by BodyReader, then
	  BodyPipe.