ldapmodify allows to add multiple Attribute with the same value (ITS#3066)

[rhafer@suse.de]

Full_Name: Ralf Haferkamp
Version: 2.2.8
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (212.95.104.168)


The following LDIF doesn't trigger an error when used with ldapmodify:

dn: uid=test,ou=people,dc=suse,dc=de
cn: test
cn: test

After the operation the "cn" attribute of the entry will have the value "test"
twice. Shouldn't this return TYPE_OR_VALUE_EXISTS?