- recovers correctly, logs status
  - for Quick mode, where no transactional environment exists, refuses to
     start if the database is inconsistent
  - warns of poor performance if DB_CONFIG is not present
  - detects changes to DB_CONFIG and forces a recovery

fix previous commit in case of access to non existent backend (e.g. rootDSE); add (and document) authzID/DN support

pwdHistory, and pwdReset NO-USER-MODIFICATION