functional: download CoreOS over HTTPS
functional: download CoreOS over HTTPS

jonboulle/fleet,dalbani/fleet,dongsupark/fleet,dongsupark/fleet,coreos/fleet,coreos/fleet,giantswarm/fleet,coreos/fleet,dalbani/fleet,endocode/fleet,dalbani/fleet,dongsupark/fleet,jonboulle/fleet,giantswarm/fleet,endocode/fleet,giantswarm/fleet,endocode/fleet,jonboulle/fleet