/mandos/trunk

Merge from pipe IPC branch.

* mandos (AvahiService.rename, main): Include PID in log messages when
                                      using a different service name.
  (Client.ReceivedSecret, Client.Rejected): New D-Bus signals.
  (TCP_handler.handle): Send IPC to parent process.
  (ForkingMixInWithPipe): New mixin class.
  (IPv6_TCPServer): Inherit from ForkingMixInWithPipe instead of
                    SocketServer.ForkingMixIn.
  (IPv6_TCPServer.handle_ipc): New method.
  (main/mandos_server): Renamed to "mandos_dbus_service" and made
                        global.
  (main/MandosServer): Renamed to "MandosDBusService".
  (main/MandosDBusService.ClientNotFound): New D-Bus signal.