add_legal_section

Adds an extra section to the Legal page.

Extra sections will be displayed below the application's own information.

The parameters copyright, license_type and license will be used to present the it the same way as [ property@AboutWindow:copyright], [property@AboutWindow:license-type] and [property@AboutWindow:license] are for the application's own information.

See those properties for more details.

This can be useful to attribute the application dependencies or data.

Examples:

```c adw_about_window_add_legal_section (ADW_ABOUT_WINDOW (about), _("Copyright and a known license"), "© 2022 Example", GTK_LICENSE_LGPL_2_1, NULL);

adw_about_window_add_legal_section (ADW_ABOUT_WINDOW (about), _("Copyright and custom license"), "© 2022 Example", GTK_LICENSE_CUSTOM, "Custom license text");

adw_about_window_add_legal_section (ADW_ABOUT_WINDOW (about), _("Copyright only"), "© 2022 Example", GTK_LICENSE_UNKNOWN, NULL);

adw_about_window_add_legal_section (ADW_ABOUT_WINDOW (about), _("Custom license only"), NULL, GTK_LICENSE_CUSTOM, "Something completely custom here."); ```

Parameters:

this	an about window
title	the name of the section
copyright	a copyright string
license_type	the type of license
license	custom license information