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Description of problem:
Service lookup shows case sensitive names twice with case_sensitive=false

Version-Release number of selected component (if applicable):
sssd-1.8.0-15

How reproducible:
Always

Steps to Reproduce:
1. Add the following service in ldap server:
dn: cn=ssh,ou=Services,dc=example,dc=com
objectClass: ipService
cn: ssh_alias1
cn: SSH_alias2
cn: ssh
ipServicePort: 22
ipServiceProtocol: tcp


2. sssd.conf domain section has:

debug_level=0xFFF0
id_provider = ldap
ldap_uri = ldap://ldapserver.example.com
ldap_search_base = dc=example,dc=com
ldap_tls_cacert = /etc/openldap/cacerts/server.pem
case_sensitive = false

3. Lookup the service ssh:
# getent services ssh
ssh     22/tcp ssh_alias1 ssh_alias2 ssh_alias2  <==SSH_alias2 is shown twice

  
Actual results:
case sensitive names appear twice.

Expected results:
All names should appear only once.

Additional info:

Upstream ticket:
https://fedorahosted.org/sssd/ticket/1253

Verified in version:

# rpm -qi sssd | head
Name        : sssd                         Relocations: (not relocatable)
Version     : 1.8.0                             Vendor: Red Hat, Inc.
Release     : 20.el6                        Build Date: Fri 30 Mar 2012 06:45:57 PM IST
Install Date: Mon 02 Apr 2012 05:36:37 PM IST      Build Host: x86-002.build.bos.redhat.com
Group       : Applications/System           Source RPM: sssd-1.8.0-20.el6.src.rpm
Size        : 7865577                          License: GPLv3+
Signature   : (none)
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://fedorahosted.org/sssd/
Summary     : System Security Services Daemon

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
No documentation needed

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2012-0747.html