Upstream: pipe length and input_filter_init in buffered mode. As long as ngx_event_pipe() has more data read from upstream than specified in p->length it's passed to input filter even if buffer isn't yet full. This allows to process data with known length without relying on connection close to signal data end. By default p->length is set to -1 in upstream module, i.e. end of data is indicated by connection close. To set it from per-protocol handlers upstream input_filter_init() now called in buffered mode (as well as in unbuffered mode).

--- zlib.h	Thu Jul  9 20:06:56 1998
+++ zlib-1.1.3/zlib.h	Tue Mar 22 13:41:04 2005
@@ -709,7 +709,6 @@
    (0 in case of error).
 */
 
-ZEXTERN int ZEXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
 /*
      Converts, formats, and writes the args to the compressed file under
    control of the format string, as in fprintf. gzprintf returns the number of