* use uint8 for clarity
* unexport writeContentAsyncAndVerify
* fix typo in test function name
* remove commented interface functions
* use atomic.Int32
* cleanups in socket server activation test
* leverage stdlib's maps and slices packages
replace uses of `golang.org/x/exp/maps`
* nit: leverage `maps.Values`
Use non-formatting logging functions for message without formatting.
For example, `log.Info("message")` instead of `log.Infof("message")`
Configure linter for printf-like functions
