cf bug 27186 -- expired cert on lists.wikimedia.org
per IRC discussion:
[11:26] <Multichil> Just add all the websites to Nagios and enable the certificate check. You'll get a nice warning a month in advance
example at http://blog.bashton.com/2010/quick-tip-check-ssl-certificate-life-in-nagios/
Version: unspecified
Severity: enhancement