confirmation for change in pod parameters

To avoid change of control some changes shall be closely supervised :

• user email
• IdP provider
• owner
• external webId

Among possibilities are :

• ask confirmation by email : email is not a MUST actually
• have a secure resource box where to check for new values where only owner has access
  actually NSS uses .meta,
  inconvenient it is discoverable in container representation, but all values are actually public)

该 issue 没有指明文件、测试或入口点。首先跟踪 pod 参数（例如用户电子邮件、IdP 提供商、所有者和外部 webId）是如何被更改的，然后与项目维护者一起定义确认和私有资源的要求。完成的标准是：通过一个已达成共识的机制防止未经监督的更改，并对其安全行为进行测试。