Please add details on the permission "access protected page password screen" to the project page and/or readme

The purpose of the permission "access protected page password screen" is not at all clear from the name or description.

It would be helpful to have an explicit description of this permission, which is required to make the module work.

Simply specifying "check your permissions" is not particularly helpful.

Cross-linking related issues where people have filed the same thing. Seems like this comes up frequently.