Other users in a network can now be given capabilities to manage users without also having global super admin privileges.
* Users with `manage_network_users` can not edit super admins.
* Users with `manage_network_users` can not promote users to super admin.
* Uses of `is_super_admin()` in `user-new.php` are now updated to `manage_network_users`.
Props daniellandau, chriscct7.
Fixes#16860.
Built from https://develop.svn.wordpress.org/trunk@33988
git-svn-id: http://core.svn.wordpress.org/trunk@33957 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Creates:
`class-wp-roles.php`
`class-wp-role.php`
`class-wp-user.php`
`capbilities-functions.php`
`capbilities.php` contains only top-level code. Class files only contains classes. Functions file only contains functions.
See #33413.
Built from https://develop.svn.wordpress.org/trunk@33752
git-svn-id: http://core.svn.wordpress.org/trunk@33720 1a063a9b-81f0-0310-95a4-ce76da25c4cd