feat: support tls for etcd client (#1390)

* feat: support tls for etcd client

* chore: fix typo

* refactor: rename TrustedCAFile to CACertFile

* docs: add comments

* fix: missing tls registration

* feat: add InsecureSkipVerify config for testing

zrpc/internal/rpcpubserver.go

@@ -21,6 +21,10 @@ func NewRpcPubServer(etcd discov.EtcdConf, listenOn string, opts ...ServerOption
 		if etcd.HasAccount() {
 			pubOpts = append(pubOpts, discov.WithPubEtcdAccount(etcd.User, etcd.Pass))
 		}
+		if etcd.HasTLS() {
+			pubOpts = append(pubOpts, discov.WithPubEtcdTLS(etcd.CertFile, etcd.CertKeyFile,
+				etcd.CACertFile, etcd.InsecureSkipVerify))
+		}
 		pubClient := discov.NewPublisher(etcd.Hosts, etcd.Key, pubListenOn, pubOpts...)
 		return pubClient.KeepAlive()
 	}