增加服务之间拷贝配置的API（开源版本只有定义，没有完全实现）

internal/db/models/http_auth_policy_dao.go

@@ -96,6 +96,27 @@ func (this *HTTPAuthPolicyDAO) UpdateHTTPAuthPolicy(tx *dbs.Tx, policyId int64,
 	return this.NotifyUpdate(tx, policyId)
 }
 
+// CloneAuthPolicy 复制策略
+func (this *HTTPAuthPolicyDAO) CloneAuthPolicy(tx *dbs.Tx, fromPolicyId int64) (int64, error) {
+	policyOne, err := this.Query(tx).
+		Pk(fromPolicyId).
+		Find()
+	if err != nil || policyOne == nil {
+		return 0, err
+	}
+	var policy = policyOne.(*HTTPAuthPolicy)
+
+	var op = NewHTTPAuthPolicyOperator()
+	op.IsOn = policy.IsOn
+	op.Name = policy.Name
+	op.Type = policy.Type
+	if len(policy.Params) > 0 {
+		op.Params = policy.Params
+	}
+	op.State = policy.State
+	return this.SaveInt64(tx, op)
+}
+
 // ComposePolicyConfig 组合配置
 func (this *HTTPAuthPolicyDAO) ComposePolicyConfig(tx *dbs.Tx, policyId int64, cacheMap *utils.CacheMap) (*serverconfigs.HTTPAuthPolicy, error) {
 	if cacheMap == nil {