High Performance Logging

[DrMickeyLauer]

While debugging a problem in NimBLE's l2cap infrastructure, I have -- once again -- witnessed the incredible amount of lag ESP_LOGx logs are adding, up to the situation where they completely can mask your problem.

I have been using a tiny "high performance logging" class for a while now, which I have now published, since I figured it might be helpful for others.

Check out at https://github.com/mickeyl/esp-hpl