Bug 584109 - Slapd crashes while parsing DNA configuration
    
    https://bugzilla.redhat.com/show_bug.cgi?id=584109
    Resolves: bug 584109
    Bug Description: Slapd crashes while parsing DNA configuration
    Fix Description: The dna_parse_config_entry() has been modified to duplicate
    the shared_cfg_base value to avoid freeing the same memory location twice.
    Reviewed by: rmeggins (and pushed by)
    (cherry picked from commit 288953655c3af087c82007d630cf8fb6558e9a9e)