added new error type "configuration or application error"
    Added check if backup is issued during diskless mode, backup refuse returned
    added possibility to get error code as a result from management client
    addded possibility to set connecstring with CONNECT command
    changed to use strcasecmp instead of strcmp
    added possibility to run one command on cammand client to ndb_mgm and get an errorcode of command fails
    made thread safe veriosn of getErrorText in management server
    aligned backup errorcodes with rest of ndb error codes giving it range from 1300
    print error message from regular ndberror struct
    added new arrer type "cofiguration or application error"
    commented on allocaded ranges for errors