etcd/etcdmain
Yicheng Qin 939aa96a34 etcdmain: improve log when join discovery fails
Before this PR, the log is

```
2015/09/1 13:18:31 etcdmain: client: etcd cluster is unavailable or
misconfigured
```

It is quite hard for people to understand what happens.

Now we print out the exact reason for the failure, and explains the way
to handle it.
2015-09-28 23:23:50 -07:00
..
2015-02-28 11:16:41 -08:00
2015-04-28 15:42:32 -04:00