Automatic merge from submit-queue kubeadm token discovery URL may not have valid input for url.Parse **What this PR does / why we need it**: **Which issue this PR fixes**: fixes https://github.com/kubernetes/kubeadm/issues/95 **Special notes for your reviewer**: /cc @dgoodwin @luxas @mikedanese this is a WIP! Need a couple things: * decide token separator, `.` or `:` * define error handling in `token.go::37`