2005-02-14 Paul Jakma <paul.jakma@sun.com>

2005-02-14 Paul Jakma <paul.jakma@sun.com>

	* stream.h: Unsigned long updated to size_t
	* stream.c: ditto
	* stream.h: Add stream_copy, stream_dup, stream_recvmsg.
	  Add comment describing struct stream abstraction, and various
	  other comments.
	  Deprecate several unsafe/ambigious macros.
	  Add STREAM_WRITEABLE and STREAM_READABLE.
	  Add (stream_getl_from) for symmetry.
	  Update stream_forward_{endp,getp} to use size_t offset.
	  Make stream data a 0 length array, rather than a seperate malloc.
	* stream.c: Add consistency checks. Update to follow stream.h
	  changes.
	  (stream_new) Alloc stream+data in one go.
	  (stream_copy) new function, copy a stream.
	  (stream_dup) new function, dup a stream.
	  (stream_recvmsg) new function, recvmsg data into a stream.
	  (stream_empty) no need to check getp == 0.