Installing old users/groups from linuxmuster6 (paedML 5.x?)

- create database dump
- use old id an gid
- Firstname, Surmane, Description, ...
  - changes:
     old: ASCII-Encoded in postgres/openldap
     new: utf8 encoded in ldb
     upload the nonexistent information (utf8 encoded stuff) 
       on next sync from schueler.txt files into ldap
  - save old ASCIIised Values in Firstname and Surname
    (For creation of Dirnames, Mailadresses, ...)

   
