wish: passwordbox feature
It should be straightforward to implement, just look at src/inputbox.*
--passwordbox text 0 0 [init]
A password box is similar to an input box, except that the text the user enters is not displayed. This is useful when prompting for passwords or other sensitive information. Be aware that if anything is passed in
“init”, it will be visible in the system's process table to casual snoopers. Also, it is very confusing to the user to provide them with a default password they cannot see. For these reasons, using “init” is highly
discouraged. See “--insecure” if you do not care about your password.
On exit, the input string will be printed on dialog's output.