(ITS#7205) olcSuffix does not support modifications

[elecharny@apache.org]

Full_Name: Emmanuel Lecharny
Version: 2.4.24
OS: Ubuntu
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (78.226.4.211)


The olcSuffix AT, which is not declared as SINGLE-VALUED, does not support more
than one value. Per se, the definition of this AT should be explicit about it.
However, this is not the main issue.

Trying to modify its value using such a LDIF file :

dn: olcDatabase={3}ldif,cn=config
changetype: modify
delete: olcSuffix
olcSuffix: cn=test2
-
add: olcSuffix
olcSuffix: cn=test3
-

leads to an error :
#!ERROR [LDAP: error code 80 - <olcSuffix> Only one suffix is allowed on this
ldif backend]

It seems that there is an internal check that is done to insure that the
olcSuffix does not contain more than one value, bypassing the AT definition, and
that this check is not correctly done when a modify operation is sent.

Deleting the olcSuffix AT and injcting a new one works.