That has just recently been repaired…it was broken for some time… I think after v 3.6 maybe … the fix may also have come after the release of 4.2 I will have to check but it is working now…
It has been mentioned many times here on the forum and is more recently documented quite nicely here…
Edit…
Ya just last week so it would have to be compiled and run from the master branch to work at the moment…