fleetd: use a sane default set of etcd endpoints
fleetd: use a sane default set of etcd endpoints

paveltiunov/fleet,coreos/fleet,webwlsong/fleet,endocode/fleet,mookjp/fleet,coreos/fleet,webwlsong/fleet,dongsupark/fleet,thepwagner/fleet,bviswana101/fleet,dongsupark/fleet,jonboulle/fleet,coreos/fleet,WPMedia/fleet,bviswana101/fleet,esatterwhite/fleet,improbable-io/fleet,jonboulle/fleet,giantswarm/fleet,improbable-io/fleet,octoblu/fleet,giantswarm/fleet,thepwagner/fleet,endocode/fleet,flandr/fleet,dalbani/fleet,dongsupark/fleet,mookjp/fleet,WPMedia/fleet,octoblu/fleet,improbable-io/fleet,dalbani/fleet,dalbani/fleet,endocode/fleet,paveltiunov/fleet,flandr/fleet,jonboulle/fleet,giantswarm/fleet,esatterwhite/fleet