Add mention of ResponseBodyAdvice

src/asciidoc/index.adoc

@@ -1068,6 +1068,7 @@ method has been added.
   methods just after the controller method returns and before the response is written.
   To take advantage declare an `@ControllerAdvice` bean that implements `ResponseBodyAdvice`.
   The built-in support for `@JsonView` and JSONP take advantage of this.
+  See <<mvc-handlermapping-interceptor>>.
 * There are three new `HttpMessageConverter` options:
 ** Gson -- lighter footprint than Jackson; has already been in use in Spring Android.
 ** Google Protocol Buffers -- efficient and effective as an inter-service communication
@@ -32094,6 +32095,17 @@ interceptor applies, you can use the MVC namespace or the MVC Java config, or de
 bean instances of type `MappedInterceptor` to do that. See <<mvc-config-enable>>.
 ====
 
+Note that the `postHandle` method of `HandlerInterceptor` is not always ideally suited for
+use with `@ResponseBody` and `ResponseEntity` methods. In such cases an `HttpMessageConverter`
+writes to and commits the response before `postHandle` is called which makes it impossible
+to change the response, for example to add a header. Instead an application can implement
+`ResponseBodyAdvice` and either declare it as an `@ControllerAdvice` bean or configure it
+directly on `RequestMappingHandlerAdapter`.
+
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