Drop-in: Disabling "wp_install_defaults" affect permalinks & "/login" redirect

[rajitrazaki]

I want to prevent default "Uncategorized" category, first post (Hello world!), first page, and default widgets.

I need to disable wp_install_defaults. So, I created Drop-in /wp-content/install.php which contains:

<?php
        function wp_install_defaults() {
        }
?>

Strangely it also disable default permalinks setting (it not select "Day and name" but "Plain" instead), even though permalinks is on different function wp_install_maybe_enable_pretty_permalinks.

It also not redirect /login/ to /wp-login.php.