// causes the named policy to be deleted.
func (c *SiteReplicationSys) PeerAddPolicyHandler(ctx context.Context, policyName string, p *policy.Policy, updatedAt time.Time) error {
	var err error
	// skip overwrite of local update if peer sent stale info
	if !updatedAt.IsZero() {
		if p, err := globalIAMSys.store.GetPolicyDoc(policyName); err == nil && p.UpdateDate.After(updatedAt) {
			return nil
		}
	}
	if p == nil {