TODOs (does not contain main items, main items can be found in the roadmap)

IMPORTANT:

* close session after connection is finished or authentification failed
  ( in DBdriver )

* session management:
  create a combined timeout for a whole session, i.e. only if a session 
  timeouts, release all other objects
  

* add a safe 'restart' command (which reloads configuration files etc., with very low downtime, and (if possible) no need to restart clients)

* make all strings translatable and add translations
