feat POST-create unique node under given path

server/v2/post_handler.go

@@ -19,10 +19,10 @@ func PostHandler(w http.ResponseWriter, req *http.Request, s Server) error {
 	}
 
 	c := &store.CreateCommand{
-		Key:               key,
-		Value:             value,
-		ExpireTime:        expireTime,
-		IncrementalSuffix: (req.FormValue("incremental") == "true"),
+		Key:        key,
+		Value:      value,
+		ExpireTime: expireTime,
+		Unique:     true,
 	}
 
 	return s.Dispatch(c, w, req)