Notes about caching pages with a CSRF Form

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | no
| Applies to    | all
| Fixed tickets | #1216
This comes from a discussion in #1216 ... I think it makes sense to have it here, but happy to move it into the caching section with links to this other cookbook. Thoughts @WouterJ @weaverryan