Call WordPress CRONs properly, removes event based cron functionality.

wp-multisite-cron.php

<?php
/*
 * Since WordPress is event driven, the wp-cron's will run on every single page load.
 * This means if you have a larger WordPress site your doing a lot of extra leg work for noreason.
 * This fixes that on Multsites
 *
 * Add this file to the root of your WordPress site and then add  define('DISABLE_WP_CRON', 'true');
 * to your wp-config.php
 *
 * Make sure that you create a true CRON job that will call your site URL via curl
 * http://www.site.com/wp-multisite-cron.php?doing_wp_cron
 * at whatever introverts you think is acceptible.
 *
 * TIMES:
 * hourly
 * twicedaily
 * daily
 * weekly
 *
 * https://www.digitalocean.com/community/tutorials/how-to-use-cron-to-automate-tasks-on-a-vps
 */

require( './wp-load.php' );

$blogs = get_sites( 0, 'all' );

foreach ( $blogs as $blog ) {
	$site_url = $blog->domain . $blog->path;

	if ( is_ssl() ) {
		$site_path = "https://$site_url/wp-cron.php?doing_wp_cron";
	} else {
		$site_path = "http://$site_url/wp-cron.php?doing_wp_cron";
	}

	$ch = curl_init( $site_path );
	$rc = curl_setopt( $ch, CURLOPT_TIMEOUT, 200 );
	$rc = curl_setopt( $ch, CURLOPT_RETURNTRANSFER, false );
	$rc = curl_exec( $ch );
	curl_close( $ch );
}