firewall_policies.go
func (c *Client) ApplyFirewallPolicy(policyId string, serverGroupId string) (*FirewallPolicy, error) {
	policy := new(FirewallPolicy)
	_, err := c.MakeApiRequest("POST", "/1.0/firewall_policies/"+policyId+"/apply_to",
		map[string]string{"server_group": serverGroupId}, &policy)
	if err != nil {
		return nil, err
	}
	return policy, nil
}
func (c *Client) ApplyFirewallPolicy(policyId string, serverGroupId string) (*FirewallPolicy, error) {
	policy := new(FirewallPolicy)
	_, err := c.MakeApiRequest("POST", "/1.0/firewall_policies/"+policyId+"/apply_to",
		map[string]string{"server_group": serverGroupId}, &policy)
	if err != nil {
		return nil, err
	}
	return policy, nil
}
// ApplyFirewallPolicy issues a request to apply the given firewall policy to
// the given server group.
//