Meta sysops can fix this at http://meta.wikimedia.org/wiki/Interwiki_map

We should probably consider updating our built in interwiki map with protocol relative urls where present. Including the new Wikimedia urls for wikis that support https.

(In reply to comment #2)

We should probably consider updating our built in interwiki map with protocol
relative urls where present. Including the new Wikimedia urls for wikis that
support https.

Already done, see r96132.

(In reply to comment #3)

(In reply to comment #2)

We should probably consider updating our built in interwiki map with protocol
relative urls where present. Including the new Wikimedia urls for wikis that
support https.

Already done, see r96132.

I'm talking about these:
http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/maintenance/interwiki.list?view=markup
http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/maintenance/interwiki.sql?view=markup

In T33327#353904, @DanielFriesen wrote:

I'm talking about these:
http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/maintenance/interwiki.list?view=markup
http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/maintenance/interwiki.sql?view=markup

https://git.wikimedia.org/blob/mediawiki%2Fcore.git/HEAD/maintenance%2Finterwiki.list and https://git.wikimedia.org/blob/mediawiki%2Fcore.git/HEAD/maintenance%2Finterwiki.sql are a mix of http and https links.

So would replacing explicit http:// and https:// prefixes in those two files by // magically work?

In T33327#963272, @Aklapper wrote:

So would replacing explicit http:// and https:// prefixes in those two files by // magically work?

Yes, but we would need to take care that URLs we convert to protocol-relative actually support both HTTP and HTTPS.

I disagree. We should use https for those that support it, and http for those that don't.

Protocol-relative URLs were a useful tool when we were mid-migration from HTTP->HTTPS and supported a dual stack and wanted to avoid cache busting. But really they're more confusing than they are useful.

The amount of documentation on wikitech/meta/enwp that still suggests them upsets me (I was reading it today)

(Also, this was never an operations or traffic bug)