Dmitry Kurochkin worked a lot on improving the HTTP Pipelining support that

previously had a number of flaws, perhaps most notably when an application
fired up N transfers at once as then they wouldn't pipeline at all that
nicely as anyone would think... Test case 530 was also updated to take the
improved functionality into account.

tests/data/test530

@@ -8,7 +8,8 @@ Pipelining
 # Server-side
 <reply>
 <servercmd>
-pipe: 4
+pipe: 1
+pipe: 3
 </servercmd>
 <data>
 HTTP/1.1 200 OK