Tweak some comments

modules/caddyhttp/responsewriter.go

@@ -170,9 +170,10 @@ func (rr *responseRecorder) WriteHeader(statusCode int) {
 		return
 	}
 
-	// save statusCode in case http middleware upgrading websocket
+	// save statusCode always, in case HTTP middleware upgrades websocket
 	// connections by manually setting headers and writing status 101
 	rr.statusCode = statusCode
+
 	// 1xx responses aren't final; just informational
 	if statusCode < 100 || statusCode > 199 {
 		rr.wroteHeader = true

modules/caddyhttp/server.go

@@ -239,7 +239,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 				return
 			}
 
-			repl.Set("http.response.status", wrec.Status())
+			repl.Set("http.response.status", wrec.Status()) // will be 0 if no response is written by us (Go will write 200 to client)
 			repl.Set("http.response.size", wrec.Size())
 			repl.Set("http.response.duration", duration)
 			repl.Set("http.response.duration_ms", duration.Seconds()*1e3) // multiply seconds to preserve decimal (see #4666)