Xiang Li 04539c6240 etcdctl: prepare for health endpoint change
We made a mistake on the health endpoint by returning a string "true".
We have to make the etcdctl works for the next version of etcd which
will correct the mistake on the server side.

It is too late to change the server side right now since we already
released a version of etcdctl that only understands "true".
2015-09-04 10:20:24 -07:00
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