func (c *Config) AutoUpdateInterval() time.Duration {
	n := c.m.GetInt64("images.auto_update_interval")
	return time.Duration(n) * time.Hour
}
func (c *Config) AutoUpdateInterval() time.Duration {
	n := c.m.GetInt64("images.auto_update_interval")
	return time.Duration(n) * time.Hour
}
// AutoUpdateInterval returns the configured images auto update interval.