Comment 67 for bug 1403152

> James Dempsey, the upstream commit you referenced is in trusty lts-vivid at Ubuntu-lts-3.19.0-49.55_14.04.1

specifically, upstream it's commit 30f7ea1c2b5f5fb7462c5ae44fe2e40cb2d6a474 and in the trusty lts branch it's commit a8412804321b96aac2665527535ac28a934ed0e2