Fix according to go vet results

proxy/freedom/freedom.go

@@ -39,12 +39,12 @@ func init() {
 type Handler struct {
 	policyManager policy.Manager
 	dns           dns.Client
-	config        Config
+	config        *Config
 }
 
 // Init initializes the Handler with necessary parameters.
 func (h *Handler) Init(config *Config, pm policy.Manager, d dns.Client) error {
-	h.config = *config
+	h.config = config
 	h.policyManager = pm
 	h.dns = d