Use golint to normalize the code (#1)

internal/qqwry/download.go

@@ -35,7 +35,7 @@ func get(url string) (b []byte, err error) {
 	defer resp.Body.Close()
 
 	b, err = ioutil.ReadAll(resp.Body)
-	return
+	return b, err
 }
 
 func getKey(b []byte) (key uint32, err error) {
@@ -43,7 +43,7 @@ func getKey(b []byte) (key uint32, err error) {
 		return 0, errors.New("copywrite.rar is corrupt")
 	}
 	key = binary.LittleEndian.Uint32(b[20:])
-	return
+	return key, err
 }
 
 func decrypt(b []byte, key uint32) (_ []byte, err error) {

internal/qqwry/wry.go

@@ -21,7 +21,7 @@ func init() {
 				log.Error("Download qqwry.dat failed, caused by:%v, recommend to download it by yourself otherwise the `IpArea` will be null", err.Error())
 			}
 		}
-	} else if info.ModTime().Sub(time.Now()) > 5*24*time.Hour {
+	} else if time.Until(info.ModTime()) > 5*24*time.Hour {
 		log.Info("Updating qqwry.dat...")
 		err := download()
 		if err != nil {