Merge branch '6.1' into 6.2

* 6.1:
  Remove a versionadded directive
  Link to a reference
  [FrameworkBundle][HttpKernel][TwigBridge] Add an helper to generate fragments URL

Author: javiereguiluz

reference/twig_reference.rst

@@ -63,6 +63,24 @@ falls back to the behavior of `render`_ otherwise.
     in the function name, e.g. ``render_hinclude()`` will use the hinclude.js
     strategy. This works for all ``render_*()`` functions.
 
+fragment_uri
+~~~~~~~~~~~~
+
+.. code-block:: twig
+
+    {{ fragment_uri(controller, absolute = false, strict = true, sign = true) }}
+
+``controller``
+    **type**: ``ControllerReference``
+``absolute`` *(optional)*
+    **type**: ``boolean`` **default**: ``false``
+``strict`` *(optional)*
+    **type**: ``boolean`` **default**: ``true``
+``sign`` *(optional)*
+    **type**: ``boolean`` **default**: ``true``
+
+Generates the URI of :ref:`a fragment <fragments-path-config>`.
+
 controller
 ~~~~~~~~~~