Last modified: 2014-02-20 15:38:51 UTC
https://www.mediawiki.org/wiki/Extension:PageImages says WTFPL (yay!) but not mentioned in code
...and extension is deployed on WMF servers.
Change 114480 had a related patch set uploaded by MaxSem: Add COPYING https://gerrit.wikimedia.org/r/114480
Change 114480 merged by jenkins-bot: Add COPYING https://gerrit.wikimedia.org/r/114480