[master] add TCP pipelining support

4040.	[func]		Added server-side support for pipelined TCP
			queries. TCP connections are no longer closed after
			the first query received from a client. (The new
			"keep-response-order" option allows clients to be
			specified for which the old behavior will still be
			used.) [RT #37821]

bin/tests/system/pipelined/tests.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+#
+# Copyright (C) 2014  Internet Systems Consortium, Inc. ("ISC")
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+
+SYSTEMTESTTOP=..
+. $SYSTEMTESTTOP/conf.sh
+
+status=0
+
+echo "I:check pipelined TCP queries"
+ret=0
+./pipequeries < input > raw || ret=1
+awk '{ print $1 " " $5 }' < raw > output
+sort < output > output-sorted
+diff ref output-sorted || { ret=1 ; echo "I: diff sorted failed"; }
+diff ref output > /dev/null && { ret=1 ; echo "I: diff out of order failed"; }
+if [ $ret != 0 ]; then echo "I:failed"; fi
+status=`expr $status + $ret`
+
+echo "I:check keep response order"
+ret=0
+./pipequeries ++ < inputb > rawb || ret=1
+awk '{ print $1 " " $5 }' < rawb > outputb
+diff refb outputb || ret=1
+if [ $ret != 0 ]; then echo "I:failed"; fi
+status=`expr $status + $ret`
+
+echo "I:exit status: $status"
+exit $status