After a recent email to Maven Users list, I discovered the new <mirrorOf></mirrorOf> feature has not been documented *anywhere official.
It is not in the 2.0.5 changelog, nor in JIRA (that I've found), nor in settings.xml reference , etc. The only place this has been "documented" is on the Maven Users and Maven Developer email lists, and in various blogs . I find it very strange that a new feature made it into Maven without a corresponding JIRA – so perhaps it might even make sense to retroactively add it?
This needs to be documented somewhere (probably multiple places) asap.