Documentation: add encryption wrapper to integrations
- [etcd/clientv3](https://github.com/coreos/etcd/blob/master/clientv3) - the officially maintained Go client for v3
- [etcd/client](https://github.com/coreos/etcd/blob/master/client) - the officially maintained Go client for v2
- [go-etcd](https://github.com/coreos/go-etcd) - the deprecated official client. May be useful for older (<2.0.0) versions of etcd.
+- [encWrapper](https://github.com/lumjjb/etcd/tree/enc_wrapper/clientwrap/encwrapper) - encWrapper is an encryption wrapper for the etcd client Keys API/KV.
**Java libraries**
