Bug 640027 - Naming attribute with a special char sequence parsing bug
Description: When DN is made from RDNs containing escaped plus
"\+", the dn normalizer considers the value could be nested multi-
valued RDNs. (e.g., cn=C\=Z\+A\=X\+B\=Y\,o\=O,o=OO)
In that case, multi-valued RDNs are sorted by the normalizer.
The sample DN provided by Andrey Ivanov contains "\+", but that
is not a separator for the multi-valued RDNs:
The dn normalizer should have checked the possibility, as well.
The check is added in this patch.
Also, sorting was not triggered if multi-valued RDNs are located
at the end of the value. (e.g., cn=C\=X\,B\=Y\+A\=Z,o=OO)
The bug was fixed, as well.