Where have RNA datablocks gone since 2.78b ?

I just noticed that the RNA datablocks have disappeared from the Datablocks Outliner since the 2.78b release (they were still there in 2.78a), and they didn’t come back in c (nor in master).
Have they been moved somewhere else or simply removed ?
There’s no precision about it in the release notes.


Still haven’t found an answer to that (in other words, bump)