Suggestion: submitting `luci-app-natflow-users` to OpenWRT project

[manhtu8x]

I am using x-wrt for Xiaomi 4A giga. I really like the "luci-app-natflow-users" network user manager. I hope you can pack it into an ipk installation file. Thank!

[Beaverfffan]

maybe not a easy solution。natflow is a different way to transfer data，luci-app-natflow-users base on natflow.