MySQL: I would like to export the "description" of the MySQL Server variables to a csv

I need a CSV with all the MySQL Server Variables and a **basic description** of what the variable means. Like you can find here: http://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html I know how to get the Server Variables + values, but I want an **extra column** behind it, with the **description** of what it means. The MySQL workbench program, has these values, see "*Status and System variables*" but when I copy these lines and paste them in a spreadheet, only the names and values are pasted, but not the description. I have not been able to find it on google or this forum. Strange because I would suspect others could have had this question before. Thank for your help.