Added the version_strategy option to the config reference

Author: javiereguiluz

reference/configuration/framework.rst

@@ -75,6 +75,7 @@ Configuration
     * `packages`_
     * `version`_
     * `version_format`_
+    * `version_strategy`_
 * `templating`_
     * `hinclude_default_template`_
     * :ref:`form <reference-templating-form>`
@@ -1015,6 +1016,7 @@ Each package can configure the following options:
 * :ref:`base_urls <reference-assets-base-urls>`
 * :ref:`version <reference-framework-assets-version>`
 * :ref:`version_format <reference-assets-version-format>`
+* :ref:`version_strategy <reference-assets-version-strategy>`
 
 .. _reference-framework-assets-version:
 .. _ref-framework-assets-version:
@@ -1133,6 +1135,16 @@ is set to ``5``, the asset's path would be ``/images/logo.png?version=5``.
     any URL rewriting. The latter option is useful if you would like older
     asset versions to remain accessible at their original URL.
 
+.. _reference-framework-assets-version_strategy:
+
+version_strategy
+................
+
+**type**: ``string`` **default**: null
+
+The service id of the :doc:`asset version strategy </frontend/custom_version:strategy>`
+applied to the assets.
+
 templating
 ~~~~~~~~~~