如果用户没有在VM部署任务文件中指定任何自定义配置，则run . conf中就不会设置usr_cfg_app属性。
If user does not specify any customized configuration in the VM deployment task file, the property USR_CFG_APP will not be set in run.conf.
具有可配置更新设置的对象包括受控词汇表(CVL)、库属性定义、库属性值列表、本机文件夹列表以及用户和组列表。
The objects with configurable update Settings are controlled vocabulary lists (CVLs), library property definitions, library property values lists, native folder lists, and user and group lists.
例如，如果提供程序需要文件路径的信息来连接到用户的邮箱，可以将文件路径的设置添加到属性文件中。
For example, if the provider needs the file path information to connect to the user's mail box, he can add a file path setting to the properties file.
这个服务器版本与客户机设置的主要差异是，它没有指定加密属性文件，而且加密用户名设置是useReqSigCert。
The main differences from the client settings are that this server version doesn't specify an encryption properties file, and the encryption username setting is useReqSigCert.
设置完成后，即使是root用户也不能删除文件，直到属性解除。
If this is set, even root cannot delete the file until the attribute is unset.
从属性文件读取的和在实例化 ClientIdCallbackHandler时设置的用户名和密码。
Username and password read from a properties file and set when the ClientIdCallbackHandler is instantiated.
如果文件设置了‘a’属性，数据只能采用追加模式，仅仅超级用户或者拥有CAP _ LINUX _ IMMUTABLE能力的进程可以设置和删除该属性。
A file with the 'a' attribute set can only be open in append mode for writing. Only the superuser or a process possessing the CAP_LINUX_IMMUTABLE capability can set or clear this attribute.
如果文件设置了‘a’属性，数据只能采用追加模式，仅仅超级用户或者拥有CAP _ LINUX _ IMMUTABLE能力的进程可以设置和删除该属性。
A file with the 'a' attribute set can only be open in append mode for writing. Only the superuser or a process possessing the CAP_LINUX_IMMUTABLE capability can set or clear this attribute.
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