Close the response body on 503

This fixes the EOF error once and for all. It was my fault all along :(

ironmq.go

@@ -76,23 +76,17 @@ func (c *Client) req(method, endpoint string, body []byte, data interface{}) err
 
 	const maxRetries = 5
 	tries := uint(0)
-	eofCount := 0
 	var resp *http.Response
 	for tries < maxRetries {
 		resp, err = http.DefaultClient.Do(req)
 		if err != nil {
-			if err == io.EOF && eofCount < 3 {
-				golog.Debugf("Retrying because of EOF %v\nPayload: %s\n", eofCount, body)
-				eofCount++
-				req.Body = ioutil.NopCloser(bytes.NewBuffer(body))
-				continue
-			}
 			return err
 		}
 		// ELB sometimes returns this when load is increasing; we retry
 		// with exponential backoff
 		if resp.StatusCode == http.StatusServiceUnavailable {
 			golog.Debugf("Retrying because of 503 %v\nPayload: %s\n", tries, body)
+			resp.Body.Close()
 			tries++
 			// random delay between 0 and (4^tries*100) milliseconds
 			pow := int64(1) << (2 * tries) * 100