Bug 703990 - Support upgrade from Red Hat Directory Server
    
    https://bugzilla.redhat.com/show_bug.cgi?id=703990
    Resolves: bug 703990
    Bug Description: Support upgrade from Red Hat Directory Server
    Reviewed by: nkinder (Thanks!)
    When doing an upgrade to a machine of a new architecture, allow the
    database to be upgraded "in place" by setup-ds.pl -u with LDIF files.
    If there is a file in the database ldif directory called
    backendname.upgrade.ldif, this file will be imported and renamed
    if the import was successful.
    Also fixed a bug in setup-ds.res
    Flag Day: yes
    Docs: yes
    (cherry picked from commit 0580a92aed03dbbf4f6fa8c0da679307c67056ed)