fixup

Author: ronag

examples/proxy/proxy.js

@@ -213,8 +213,9 @@ function getHeaders ({
       `proto=${socket.encrypted ? 'https' : 'http'}`,
       `host=${printIp(authority || host || '')}`
     ].join(';'))
-  } else {
-    result.push('forwarded', forwarded)
+  } else if (forwarded) {
+    // forwarded should not be included in response headers.
+    throw new createError.BadGateway()
   }
 
   if (httpVersion && proxyName) {