Merge branch '4.4' into 5.3

* 4.4:
  [Form] Minor deletion
  Update definition.rst
  Document by_reference option
  Update Monolog processors github url

Author: wouterj

components/config/definition.rst

@@ -827,7 +827,8 @@ character (``.``)::
 
     $node = $treeBuilder->buildTree();
     $children = $node->getChildren();
-    $path = $children['driver']->getPath();
+    $childChildren = $children['connection']->getChildren();
+    $path = $childChildren['driver']->getPath();
     // $path = 'database.connection.driver'
 
 Use the ``setPathSeparator()`` method on the config builder to change the path
@@ -838,7 +839,8 @@ separator::
     $treeBuilder->setPathSeparator('/');
     $node = $treeBuilder->buildTree();
     $children = $node->getChildren();
-    $path = $children['driver']->getPath();
+    $childChildren = $children['connection']->getChildren();
+    $path = $childChildren['driver']->getPath();
     // $path = 'database/connection/driver'
 
 Processing Configuration Values

form/form_customization.rst

@@ -268,8 +268,9 @@ Renders any errors for the given field.
 
 .. caution::
 
-    In the :ref:`error messages of Bootstrap 5 Form Theme <reference-forms-bootstrap5-error-messages>`,
-    ``form_errors()`` is already included in ``form_label()``.
+    In the Bootstrap 4 form theme, ``form_errors()`` is already included in
+    ``form_label()``. Read more about this in the
+    :ref:`Bootstrap 4 theme documentation <reference-forms-bootstrap5-error-messages>`.
 
 .. _reference-forms-twig-widget:
 

logging/processors.rst

@@ -286,4 +286,4 @@ the ``monolog.processor`` tag:
             ->addTag('monolog.processor', ['channel' => 'main']);
 
 .. _`Monolog`: https://github.com/Seldaek/monolog
-.. _`built-in Monolog processors`: https://github.com/Seldaek/monolog/tree/master/src/Monolog/Processor
+.. _`built-in Monolog processors`: https://github.com/Seldaek/monolog/tree/main/src/Monolog/Processor

reference/forms/types/entity.rst

@@ -284,6 +284,8 @@ type:
 
 .. include:: /reference/forms/types/options/attr.rst.inc
 
+.. include:: /reference/forms/types/options/by_reference.rst.inc
+
 .. include:: /reference/forms/types/options/data.rst.inc
 
 .. include:: /reference/forms/types/options/disabled.rst.inc