go Serve(ln, HandlerFunc(func(w ResponseWriter, r *Request) {
		if _, ok := r.Header["Expect"]; !ok {
			t.Error("Expect header should not be filtered out")
		}
	}))
	<-conn.closec
}

func TestIssue11549_Expect100(t *testing.T) {
	req := reqBytes(`PUT /readbody HTTP/1.1
User-Agent: PycURL/7.22.0
Host: 127.0.0.1:9000
Accept: */*
Expect: 100-continue
Content-Length: 10