APS installer in chrooted PHP-FPM: database connection problems

Use case:

• I have a server running web and db
• The server is running a site called example.com, using chrooted php-fpm
• I use the APS installer to install WordPress to example.com

Problem: the installed wp-config.php contains the database host localhost:3306, which causes PHP to attempt a connection to a unix socket rather than over TCP/IP. The unix socket file does not exist in the chroot, so the database connection fails.

Possible solutions:

1. from what I read it is not possible to create a link to a socket file, so jailkit is not an option
2. using bind mounts could be an option, but there are already thousands of bind mounts on this server for all the log files, so I don't want to create even more
3. in https://git.ispconfig.org/ispconfig/ispconfig3/blob/master/interface/lib/classes/aps_guicontroller.inc.php#L249 , we could do something like:

$settings['main_database_host'] = 'localhost';
$mysql_db_remote_access = 'n';
$mysql_db_remote_ips = '';

if (some condition) {
    $settings['main_database_host'] = '127.0.0.1';
    $mysql_db_remote_access = 'y';
    $mysql_db_remote_ips = '127.0.0.1';
}

I think option 3 would be nicest, but it might break compatibility for people who run MySQL with skip-networking 🤔 As for the condition, I could try to read the Site's configuration and see if php_fpm_chroot is enabled (from !870 (diffs)).

Just wondering if you guys agree, or if you perhaps see other/better options?