Comment 6 for bug 1822340

> We're only SRUing this to trusty, as xenial and bionic will have some more changes, and it would just be a waste of time to SRU the trusty one there.

For the record, I think this is acceptable over regular SRU policy because the nature of this update _is_ to provide something special in Trusty as it's going into ESM. So normal concerns over users regressing when they release upgrade do not apply to this case. I see that there's general "umbrella" code added to Disco/Eoan already for the long term case.