add comment for etcd function
add comment for etcd function

ppknap/kite,rjeczalik/kite,leeola/kite,leeola/kite,koding/kite,280455936/kite,ppknap/kite,fatih/kite,wingyplus/kite,cihangir/kite,mischief/kite,koding/kite,koding/kite,fatih/kite,rjeczalik/kite,mischief/kite,280455936/kite,ppknap/kite,cihangir/kite,rjeczalik/kite,wingyplus/kite