Prefer use logging in butil or glog?

Is your feature request related to a problem? (你需要的功能是否与某个问题有关?) I see there is a simple logging mechanism delivered along with brpc in butil/logging.cc. I'm not sure whether it is aimed to be production ready or just a default demo. It lack some important feature, like rotation. But on the other hand, i see @chenBright is still try to optimize it for performance month ago.

Describe the solution you'd like (描述你期望的解决方法) I want to know, whether a logging implementation is in brpc's road map, or we just depend on glog's ecosystem？

Describe alternatives you've considered (描述你想到的折衷方案)

Additional context/screenshots (更多上下文/截图)