landing b_lcfg to b_devel

landing b_lcfg to b_devel

- llog network api for processing the log from the client
- config messages changed to use struct lustre_cfg and struct
  portals_cfg
- lctl record options save config messages to log on the mds
- ll_fill_super supports fetching the log and replaying to setup
  the devices needed for mount.
- small changes to lctl interface to support new config protocol.

  - newdev is now a no-op.
  - cfg_device <device name> is used to set the target device for
    detach and cleanup.