Bug 635987 - Incorrect sub scope search result with ACL containing ldap:///self
    
    https://bugzilla.redhat.com/show_bug.cgi?id=635987
    
    Description:
    This commit made for the bug 635987 introduced a bug to replication.
    commit 8ac525e5ac997378f4f2a386e9b96568c8d66db5
    Author: Noriko Hosoi <nhosoi@redhat.com>
    Date:   Tue Sep 21 15:12:07 2010 -0700
    
    subtree_candidates (ldbm_search.c)
    If you do have a tombstone filter, descendants will be NULL,
    and idl_intersection of candidates and descendents will wipe
    out all of the candidates, leaving just the one entry, e->ep_id.
    
    Changed to call idl_intersection only when the filter is not
    for tombstone or entryrdn_get_noancestorid (false, by default).