Password Reset for Users on a Multisite Subsite

This works well!

“By default, WordPress Multisite uses the main blog for passwort resets. This plugin enables users to stay in their blog during the whole reset process.”

<?php
/**
 * Plugin Name: Multisite: Passwort Reset on Local Blog
 * Plugin URI:  https://gist.github.com/eteubert/293e07a49f56f300ddbb
 * Description: By default, WordPress Multisite uses the main blog for passwort resets. This plugin enables users to stay in their blog during the whole reset process.
 * Version:     1.0.0
 * Author:      Eric Teubert
 * Author URI:  http://ericteubert.de
 * License:     MIT
 */
// fixes "Lost Password?" URLs on login page
add_filter("lostpassword_url", function ($url, $redirect) { 

    $args = array( 'action' => 'lostpassword' );

    if ( !empty($redirect) )
        $args['redirect_to'] = $redirect;
    return add_query_arg( $args, site_url('wp-login.php') );
}, 10, 2);
// fixes other password reset related urls
add_filter( 'network_site_url', function($url, $path, $scheme) {

    if (stripos($url, "action=lostpassword") !== false)
        return site_url('wp-login.php?action=lostpassword', $scheme);

    if (stripos($url, "action=resetpass") !== false)
        return site_url('wp-login.php?action=resetpass', $scheme);

    return $url;
}, 10, 3 );
// fixes URLs in email that goes out.
add_filter("retrieve_password_message", function ($message, $key) {
    return str_replace(get_site_url(1), get_site_url(), $message);
}, 10, 2);
// fixes email title
add_filter("retrieve_password_title", function($title) {
    return "[" . wp_specialchars_decode(get_option('blogname'), ENT_QUOTES) . "] Password Reset";
});