Merge branch '4.3' into 4.4

* 4.3:
  Fix wrong heading for not_compromised_password
  Update guard_authentication.rst

Author: javiereguiluz

reference/configuration/framework.rst

@@ -2274,7 +2274,7 @@ error messages.
 .. _reference-validation-not-compromised-password:
 
 not_compromised_password
-~~~~~~~~~~~~~~~~~~~~~~~~
+........................
 
 The :doc:`NotCompromisedPassword </reference/constraints/NotCompromisedPassword>`
 constraint makes HTTP requests to a public API to check if the given password
@@ -2283,7 +2283,7 @@ has been compromised in a data breach.
 .. _reference-validation-not-compromised-password-enabled:
 
 enabled
-.......
+"""""""
 
 **type**: ``boolean`` **default**: ``true``
 
@@ -2297,7 +2297,7 @@ make HTTP requests, such as in ``dev`` and ``test`` environments or in
 continuous integration servers.
 
 endpoint
-........
+""""""""
 
 **type**: ``string`` **default**: ``null``
 

security/guard_authentication.rst

@@ -38,7 +38,7 @@ directly to your ``User`` class (the ``make:entity`` command is a good way to do
         // ...
 
     +     /**
-    +      * @ORM\Column(type="string", unique=true)
+    +      * @ORM\Column(type="string", unique=true, nullable=true)
     +      */
     +     private $apiToken;