Fix HTTP stream leaking problem
Fix HTTP stream leaking problem

--- a/doh-client/client.go
+++ b/doh-client/client.go
@@ -224,6 +224,7 @@
 	}
 
 	if req.response != nil {
+		defer req.response.Body.Close()
 		for _, header := range c.conf.DebugHTTPHeaders {
 			if value := req.response.Header.Get(header); value != "" {
 				log.Printf("%s: %s\n", header, value)