(ITS#3479) back-sql not returning any "matchedDN" when appropriate

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: ALL
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (81.72.89.40)
Submitted by: ando


Except for failed add and searches for bases rooted in a referral, back-sql
never sets the matchedDN field (I might have missed few more).  Its disclosure
should be subject to access control according to ITS#3472 ("disclose" level).