bisect identifies c365ac359e9c9b483b934c2a1f0bc552645c32fa as the commit that introduced this behaviour.

003dfbda574f37bbf1a2240f530ff9fa35ab0801 on RE24 (2.4.20)

commit c365ac359e9c9b483b934c2a1f0bc552645c32fa Author: Howard Chu hyc@openldap.org Date: Sun Nov 22 04:42:00 2009 +0000

ITS#6368 use dup'd entries in response queue