etcdctlv3: updated readme for make-mirror: modify/remove prefix in dest cluster
@@ -671,6 +671,10 @@ the database, the etcd member releases this free space back to the file system.
- prefix -- The key-value prefix to mirror
+- dest-prefix -- The destination prefix to mirror a prefix to a different prefix in the destination cluster
+
+- no-dest-prefix -- Mirror key-values to the root of the destination cluster
#### Return value
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Gyu-Ho Lee