Notes about caching pages with a CSRF Form

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | no
| Applies to    | all
| Fixed tickets | #1216
Well, either get the full form markup, just the hidden field markup or even just the token string via an uncached AJAX request. 

It may be tricky to explain it with words and make it clear for someone who is not familiar with all these concepts...