This diff imports improved bogons handling code from websteps winter 2022 edition's repository. See https://github.com/ooni/probe/issues/2095 See a65f3e8579/internal/netxlite/bogon.go
a65f3e8579/internal/netxlite/bogon.go
I develop this diff while working on https://github.com/ooni/probe/issues/1803#issuecomment-957323297. While there, make sure we don't have duplicate bogon code and always use the code inside netxlite.