[sheepdog] [PATCH] sheep: add a kill node operation

[Dietmar Maurer]

> Yes, maybe, manual recovery (only update internal state, and not do data
> load balance) could be a better approach to handle a smaller range problem.
> This also need smaller code changes compared with temporary failure
> detection.

re-balance always involves massive network traffic. So IMHO this must be manually triggered.
If someone want do that automatically he can write a script ;-)

- Dietmar