clarify cookie header cleaning for varnish vs symfony httpcache

Author: dbu

doc/symfony-cache-configuration.rst

@@ -329,6 +329,8 @@ options through the constructor:
  RewriteEngine On
  RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
 
+.. _symfony_cookie_header:
+
 Cleaning the Cookie Header
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 

doc/user-context.rst

@@ -199,9 +199,9 @@ is granted extra permissions by an administrator.
 
 .. note::
 
- If you base the user hash on the Cookie header, you should
- :ref:`clean up that header <cookie_header>` to make the hash request
- properly cacheable.
+ If you base the user hash on the Cookie header, you should clean up that header
+ to make the hash request properly cacheable: :ref:`Varnish <varnish_cookie_header>`,
+ :ref:`Symfony HttpCache <symfony_cookie_header>`.
 
 The Original Request
 --------------------

doc/varnish-configuration.rst

@@ -364,6 +364,7 @@ request with :ref:`a proper user hash <return context hash>`.
  your own VCL.
 
 .. _cookie_header:
+.. _varnish_cookie_header:
 
 Cleaning the Cookie Header
 ^^^^^^^^^^^^^^^^^^^^^^^^^^

src/SymfonyCache/CacheInvalidation.php

@@ -13,6 +13,7 @@
 
 use function class_alias;
 use function class_exists;
+
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\Kernel;