default redis reads options

details in https://github.com/chrislusf/seaweedfs/pull/1165

weed/command/scaffold.go

@@ -136,8 +136,10 @@ addresses = [
     "localhost:30006",
 ]
 password = ""
-readOnly = false
-routeByLatency = false
+// allows reads from slave servers or the master, but all writes still go to the master
+readOnly = true
+// automatically use the closest Redis server for reads
+routeByLatency = true
 
 [etcd]
 enabled = false