Bug 711241 - memory leak found by reliab12
    
    https://bugzilla.redhat.com/show_bug.cgi?id=711241
    
    Description: str2entry_dupcheck (entry.c):
    If attributedeletioncsn was associated with entrydn and flag
    SLAPI_STR2ENTRY_NO_ENTRYDN is set, the address was not released.
    This patch fixes the leak.
    
    cherry-picked commit: 2af101b69ece052498158fd50804d843d75ef1a0