解析获得github及相关二级域名的ip地址，运行主程序，将输出的内容复制到hosts中
#GitHub start
140.82.113.3 www.github.com
199.232.96.133 raw.githubusercontent.com
199.232.96.133 avatars8.githubusercontent.com
199.232.96.133 avatars5.githubusercontent.com
199.232.96.133 avatars2.githubusercontent.com
199.232.96.133 camo.githubusercontent.com
199.232.96.133 avatars3.githubusercontent.com
199.232.96.133 avatars1.githubusercontent.com
199.232.96.133 avatars7.githubusercontent.com
199.232.96.133 cloud.githubusercontent.com
199.232.96.133 avatars0.githubusercontent.com
199.232.96.133 avatars6.githubusercontent.com
199.232.96.133 avatars4.githubusercontent.com
199.232.96.133 avatars.githubusercontent.com
199.232.96.133 gist.githubusercontent.com
#GitHub end