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Description of problem:

When implementing CoS for an attribute that includes a language code (RFC2596), it's value is NOT returned during searching. When implementing CoS for the same attribute without a language code (RFC2596), the value is returned. 

How reproducible:

Always.

Steps to Reproduce:

Set up a simple CoS and a CoS template.

dn: cn=CIKO CoS,ou=CIKO,ou=People,dc=ru,dc=acad,dc=bg
cosAttribute: ou;lang-bg
cosAttribute: ou
costemplatedn: cn=CIKO Template, cn=CIKO CoS, ou=CIKO,ou=People,dc=ru,dc=acad,dc=bg
objectClass: top
objectClass: ldapsubentry
objectClass: cossuperdefinition
objectClass: cosPointerDefinition
cn: CIKO CoS

dn: cn=CIKO Template,cn=CIKO CoS,ou=CIKO,ou=People,dc=ru,dc=acad,dc=bg
cn: CIKO Template
cosPriority: 1
ou;lang-bg:: 0KbQmNCa0J4=
objectClass: top
objectClass: costemplate
objectClass: extensibleobject

Do an ldapsearch on an object, that should inherit the CoS definition.

# ldapsearch -x uid=dstoykov ou -LLL 

Actual results:

dn: uid=dstoykov,ou=CIKO,ou=People,dc=ru,dc=acad,dc=bg
ou: CIKO 

Expected results:

dn: uid=dstoykov,ou=CIKO,ou=People,dc=ru,dc=acad,dc=bg
ou: CIKO
ou;lang-bg:: 0KbQmNCa0J4=

This was tested with centos-ds-8.1.0. Unfortunately, I can't test with an up-to-date 389-ds at this time.

This bug is not limited to attribute language codes. Any CoS with attribute subtypes does not work (http://lists.fedoraproject.org/pipermail/389-users/2011-June/013250.html)

Upstream ticket:
https://fedorahosted.org/389/ticket/69

This bug has been unresolved for a long time, and it is not a priority to fix.  This bug is being closed since there is not a pressing reason to address it, though the upstream ticket will remain open in case someone in the community is compelled to provide a patch.