I've just checked Org 5.20 -- great!

Carsten Dominik <dominik@science.uva.nl> writes:

>     - There is a new variable `org-special-ctrl-k'.  When set, `C-k'
>     will behave specially in headlines:

When I stumble upon `org-ctrl-special-k', I thought to myself: "Doh!
People are even using Org to control what they have for breakfast.."