Comment 8 for bug 1916935

@paelzer Thank you for the triaging and the detailed explanation. Since this change slipped in too long ago I don't think it should be reverted.
I think Postresql could check if there was a change in sorting compared to the which the indices were created with, but this installation does not uses Postgresql from the archive so that would just be an unrelated improvement. Maybe Postgres already does that.