Together with https://github.com/lifenjoiner/dnsforwarder which turns on parallel query and CacheParallel, it may yield better availability.
与开启并发查询和CacheParallel的 https://github.com/lifenjoiner/dnsforwarder 一起使用，可一定程度上缓解 Github 经常抽风访问不到、被随机劣化。
OS version support depends on Go.