DNS records for additional local IP addresses

##### ISSUE TYPE
* Feature Idea

##### COMPONENT NAME
* DNS

##### CLOUDSTACK VERSION
/

##### CONFIGURATION
* for customer isolated network

##### OS / ENVIRONMENT
/

##### SUMMARY
For adaptive computing it's important to get use of additional application local IP addresses which you can move between machines in case of a failure of one of the virtual machines or for upgrades.

I can attach an additional IP to a VM using ACS. But I cannot give that a separate name which does not belong to the actual hostname of the VM.

##### STEPS TO REPRODUCE

##### EXPECTED RESULTS
* possibility to add a DNS name for the additional local IP address
* possibility to move an IP from one system to another (no delete and recreate - IP could be taken in the steps between)

##### ACTUAL RESULTS
* currently the additional IP resolves into the same name as the original IP which is the hostname

從 CloudStack DNS 元件開始，追蹤目前額外的本機 IP 位址如何解析至 VM 的主機名稱。定義如何指派一個獨立的 DNS 名稱，以及如何在不刪除和重新建立的情況下將 IP 在虛擬機器之間移動；當兩個預期結果都能在隔離的客戶網路中正常運作時，即視為完成。

由索引模型根據 Issue 內容生成。