…display HTTP codes and backend latencies. It also allows contact for localhost:<>/debug/vars to see internal server information including requests. This is disabled by default. Also fixes a race condition found during testing. ```go build -o ~/bin/inverting-proxy ./server

go build -o ~/bin/proxy-forwarding-agent ./agent
go build -o ~/bin/inverting-proxy-run-local testing/runlocal/main.go
GOPATH=$HOME ~/bin/inverting-proxy-run-local --port 8081

cd ~/inverting-proxy
     go test -race -v ./agent/sessions/...
     go test -race -v ./agent/stats/...
     go test -race -v ./agent/metrics/...
     go test -race -v ./agent/utils/...
     go test -race -v ./agent/websockets/...
     go test -race -v ./agent/...``` used  watch -n 5 "curl -s http://localhost:3000 | lynx -stdin -dump" and hey -z 1m -q 10 http://127.0.0.1:8081/