How do I make the custom module "Configure" option appear on the module list? I have written a simple module that implements hook_menu() (the added path is admin/settings/mymodule"). 

On the admin/modules page which lists all the present modules, there is no "Configure" link for my module. How do I implement it so that the link to "admin/settings/mymodule" is visible on the modules page?
It's done in the module's ".info" file, using the "configure" key.

name = Example module
description = Gives an example of a module.
core = 7.x
package = Views
dependencies[] = views
dependencies[] = panels
files[] = example.test
configure = admin/config/content/example