591336 - Implementing upgrade DN format tool
    
    Change description:
    . adding upgradednformat utility to each server instance.
    . adding 70upgradednformat.pl for in-place-upgrade.
    . implementing ldbm_back_upgradednformat sharing the import/
      reincexing codes.
    . adding a new DBVERSION ID "dn-4514" for the upgraded db.
    . fixing access logs (delete.c and modify.c)
    . fixing compiler warnings.
    . fixing a bug in syntax plugin to free strings.
    . adding templates for plugin id, version, vendor, and description,
      which are needed for the online upgrade.
    
    See also:
    https://bugzilla.redhat.com/show_bug.cgi?id=591336
    http://directory.fedoraproject.org/wiki/Upgrade_to_New_DN_Format#Migration.2FUpgrade