The Crawl wiki (hosted on crawl.chaosforge.org) seems bust:
Sorry! This site is experiencing technical difficulties.
Try waiting a few minutes and reloading.
(Cannot access the database)
Backtrace:
#0 /home/jail/home/crawl/public_html/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1028): Wikimedia\Rdbms\Database->reportConnectionError('Unknown error (...')
