CloudStack should support Selinux

##### ISSUE TYPE
Improvement Request

##### COMPONENT NAME
Management Server and Agent

##### CLOUDSTACK VERSION
All versions

##### OS / ENVIRONMENT
All

##### SUMMARY
Server security is key to meeting compliance requirements. Most linux distros have supported Selinux for well over a decade.

I'm putting this in for tracking purposes, as Selinux policy would need to be created to support ACS.

Issue 将 Management Server 和 Agent 列为受影响的组件，并请求在所有版本和环境中支持 SELinux。首先明确所需的 SELinux 策略及其兼容性目标；Issue 未定义具体的文件、测试或完成标准，因此这些内容需要维护者达成一致。

由索引模型根据 Issue 内容生成。