Dont use a separate pool for providers

Author: Nyholm

cache.rst

@@ -393,11 +393,7 @@ case the value needs to be recalculated.
                         adapters:
                           - cache.adapter.array
                           - cache.adapter.apcu
-                          - cache.my_redis
-
-                    cache.my_redis:
-                        adapter: cache.adapter.redis
-                        provider: 'redis://user:password@example.com'
+                          - {name: cache.adapter.redis, provider: 'redis://user:password@example.com'}
 
     .. code-block:: xml
 
@@ -431,13 +427,9 @@ case the value needs to be recalculated.
                         'adapters' => [
                             'cache.adapter.array',
                             'cache.adapter.apcu',
-                            'cache.my_redis',
+                            'redis://user:password@example.com' => 'cache.adapter.redis',
                         ],
                     ],
-                    'cache.my_redis' => [
-                        'adapter' => 'cache.adapter.redis',
-                        'provider' => 'redis://user:password@example.com',
-                    ],
                 ],
             ],
         ]);