GET http://localhost:8000/hello
HTTP/1.0 200

GET http://localhost:8000/hello
HTTP/1.1 200

GET http://localhost:8000/hello
HTTP/2 200

GET http://localhost:8000/hello
HTTP/3 200

GET http://localhost:8000/hello
HTTP 200

# Deprecated
GET http://localhost:8000/hello
HTTP/* 200
