master
import-boss: allow github.com/google/cadvisor/lib only where used; forbid the full module
kube-proxy: clear stale conntrack entries for UDP services with no endpoints
build: remove deprecated '// +build' tag
Mark conntrack/fake as linux-only, add non-OS doc.go
kube-proxy: detect host CPU count via cpuset.NumCPU instead of cadvisor
Consistently import pkg/proxy/apis/config as kubeproxyconfig