A complete reference to every WordPress multisite wp-config.php constant: WP_ALLOW_MULTISITE, MULTISITE, SUBDOMAIN_INSTALL, DOMAIN_CURRENT_SITE, PATH_CURRENT_SITE, SITE_ID_CURRENT_SITE, BLOG_ID_CURRENT_SITE, NOBLOGREDIRECT, SUNRISE, COOKIE_DOMAIN, SITECOOKIEPATH, COOKIEHASH, and network tweaks that separate a working network from a production-grade one.