fixup! Remove path from admission, more response helpers

pkg/webhook/server.go

@@ -80,6 +80,7 @@ func (s *Server) setDefaults() {
 // Register marks the given webhook as being served at the given path.
 // It panics if two hooks are registered on the same path.
 func (s *Server) Register(path string, hook http.Handler) {
+	s.defaultingOnce.Do(s.setDefaults)
 	_, found := s.webhooks[path]
 	if found {
 		panic(fmt.Errorf("can't register duplicate path: %v", path))