MacOS 默认 hosts 文件内容

###因为上谷歌的原因，mac os x的hosts改坏了，找到默认内容，记录下：

#
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost 
fe80::10 localhost