(ITS#4861) Issue with referrals in proxy backends

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: re23 + patches from HEAD
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (131.175.154.35)
Submitted by: ando


I've received reports of issues with referrals returned from a third-party DSA
to OpenLDAP's proxy backends.  Apparently, in some cases the response contained
referrals with a return code different from LDAP_REFERRAL.  Although I can't
prove it (it seems to be non-deterministic), I've strenghtened the proxy
backends code so that it rejects those responses instead of sending them thru
send_ldap_result(), which triggers an assertion.

p.