In this release, system-config-printer uses
PolicyKit to control access to restricted cups functionality. The following functions are controlled via
PolicyKit policies currently:
add/remove/edit 本地打印机
add/remove/edit 远程打印机
add/remove/edit 类别
enable/disable 打印机
将打印机设置成默认打印机
get/set 服务器设置
restart/cancel/edit 由另一个用户拥有的任务
restart/cancel/edit 一个任务
