Handle IPv6 in isMovedError

Author: daviddzxy

error.go

@@ -129,7 +129,20 @@ func isMovedError(err error) (moved bool, ask bool, addr string) {
 	if ind == -1 {
 		return false, false, ""
 	}
+
 	addr = s[ind+1:]
+	ind = strings.LastIndex(addr, ":")
+	if ind == -1 {
+		return false, false, ""
+	}
+
+	h := addr[:ind]
+	p := addr[ind+1:]
+	if strings.HasSuffix(h, "]") {
+		return
+	}
+
+	addr = net.JoinHostPort(h, p)
 	return
 }