Update doc.go
Update doc.go
gyuho/etcd,etcd-io/etcd,gyuho/etcd,rnaveiras/etcd,mkumatag/etcd,ajityagaty/etcd,mqliang/etcd,mqliang/etcd,coreos/etcd,rnaveiras/etcd,coreos/etcd,mqliang/etcd,rnaveiras/etcd,mkumatag/etcd,etcd-io/etcd,etcd-io/etcd,ajityagaty/etcd,mkumatag/etcd,ajityagaty/etcd