rewrote safer
    added return value to shutdown
    nicer printouts
    removed exit at shutdown


ndb/src/common/logger/Logger.cpp:
  fixed bug/compiler warning
ndb/src/mgmapi/LocalConfig.cpp:
  removed compiler warning
  rewrote safer
ndb/src/mgmclient/CommandInterpreter.cpp:
  added return value to shutdown
  nicer printouts
  removed exit at shutdown
ndb/src/ndbapi/ndb_cluster_connection.cpp:
  fixed compiler warning