E-mail notifications on the English Wikipedia currently contain protocol-relative URLs, because the user interface message http://en.wikipedia.org/wiki/MediaWiki:Enotif_body contains protocol-specific (HTTP) URLs that are transformed into protocol-relative ones.
Steps to reproduce: Obtain an email notification from an English Wikipedia talk page modification.
Expected behavior: URLs are disseminated as is, or are transformed to use $wgCanonicalServer
Actual behavior: The email contains the following text:
This email notification feature was enabled on English Wikipedia in May
2011 - see en.wikipedia.org/wiki/Help:Email_notification. If you would
like to switch off your notifications, visit
Feedback and further assistance: