hotfix(publicip): return an error if trying to use cloudflare as ip provider for updating servers data

internal/publicip/api/ifconfigco.go

@@ -20,6 +20,14 @@ func newIfConfigCo(client *http.Client) *ifConfigCo {
 	}
 }
 
+func (i *ifConfigCo) String() string {
+	return string(IfConfigCo)
+}
+
+func (i *ifConfigCo) CanFetchAnyIP() bool {
+	return true
+}
+
 // FetchInfo obtains information on the ip address provided
 // using the ifconfig.co/json API. If the ip is the zero value,
 // the public IP address of the machine is used as the IP.