Fixed slapd-ldap/meta privileged conn caching (ITS#4547)
        Fixed slapd-ldap chase-referrals switch (ITS#4557)
        Fixed slapd-ldap bind behavior when idassert is always used (ITS#4781)
        Fixed slapd-ldap response handling bugs (ITS#4782)
        Fixed slapd-ldap/meta privileged connections handling (ITS#4791)
        Fixed slapd-meta retrying (ITS#4594, 4762)
        Fixed slapo-chain referral DN use (ITS#4776)

ITS#3971, #4458, #4638, #4689