From f348aac007db04397956dcb283ae275879855b02 Mon Sep 17 00:00:00 2001
From: Hong Shuning <hongshuning@gmail.com>
Date: Thu, 4 Feb 2016 15:58:39 +0800
Subject: [PATCH] pass the travis-ci build

Use legacy group instead of default precise group.

The precise group does not support IPv6.
---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index b0a9259a962..34ab7561ee8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,8 @@
 #   command. See: https://github.com/travis-ci/travis-ci/issues/4393
 
 os: linux
+sudo: required
+group: legacy
 language: cpp
 compiler: gcc
 env: