Code review comment for ~bjornt/maas:bug-1835316-add-event-index

> That means the backport will not be a strait cherry-pick, is it possible to
> split this over 2 branches or will it not land in master?

No, it's not possible to split it over two commits. Without that merge patch,
Django will complain that there are more than one leaf patch.

On the other hand, backporting of DB patches have never been straight
cherry-picks, since they did re-ordering of db patches that didn't exist in
the backported version. So from that point of view, it's no worse than before.