cmd/render: Infer etcd-servers from service-cidr for self-hosted etcd
cmd/render: Infer etcd-servers from service-cidr for self-hosted etcd

Automatically set —etcd-servers to —service-cidr base IP + 15.
For example, if —service-cidr=10.42.0.0/24, —etcd-servers=http://10.42.0.15:2379.

diegs/bootkube,diegs/bootkube,kubernetes-incubator/bootkube,ericchiang/bootkube,ericchiang/bootkube,diegs/bootkube,hongchaodeng/bootkube,dghubble/bootkube,ericchiang/bootkube,kubernetes-incubator/bootkube,hongchaodeng/bootkube,kubernetes-incubator/bootkube,dghubble/bootkube,hongchaodeng/bootkube,dghubble/bootkube