initscript: better success/failure messages
    
    ... in case that /etc/rc.d/init.d/functions not available
    
    + problem with initial generating of configuration or db file should
      be now reported with reasonable error message (presumably the exception
      connected with that error)
    
    + change that can be considered as a fix of initscript logic, so that if
      there is a problem with "initialize" function (indicated by nonzero
      return value), starting the server is now completely omitted:
    
      -    initialize || ret=$?
      -    start_server || ret=$?
      +    initialize && start_server || ret=$