Merge branch '2.8' into 3.4

* 2.8:
  [php_cs] disable fopen_flags
  [CS] Remove unused variables passed to closures
  [CS] Remove empty comment
  [CS] Enforces null type hint on last position in phpDocs
  [CS] Use combined assignment operators when possible
  Fix a typo in error messages
  [Console] Add missing null to input values allowed types
  [PHPUnitBridge] Fix microtime() format
  bumped Symfony version to 2.8.47
  update CONTRIBUTORS for 2.8.46
  updated VERSION for 2.8.46
  updated CHANGELOG for 2.8.46

Author: nicolas-grekas

Core/User/LdapUserProvider.php

@@ -140,7 +140,7 @@ protected function loadUser($username, Entry $entry)
     /**
      * Fetches a required unique attribute value from an LDAP entry.
      *
-     * @param null|Entry $entry
+     * @param Entry|null $entry
      * @param string     $attribute
      */
     private function getAttributeValue(Entry $entry, $attribute)

Csrf/CsrfTokenManager.php

@@ -31,7 +31,7 @@ class CsrfTokenManager implements CsrfTokenManagerInterface
     private $namespace;
 
     /**
-     * @param null|string|RequestStack|callable $namespace
+     * @param string|RequestStack|callable|null $namespace
      *                                                     * null: generates a namespace using $_SERVER['HTTPS']
      *                                                     * string: uses the given string
      *                                                     * RequestStack: generates a namespace using the current master request

Guard/Firewall/GuardAuthenticationListener.php

@@ -98,7 +98,7 @@ private function executeGuardAuthenticator($uniqueGuardKey, GuardAuthenticatorIn
         $request = $event->getRequest();
         try {
             if (null !== $this->logger) {
-                $this->logger->debug('Calling getCredentials() on guard configurator.', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Calling getCredentials() on guard authenticator.', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
             }
 
             // abort the execution of the authenticator if it doesn't support the request

Guard/GuardAuthenticatorHandler.php

@@ -75,7 +75,7 @@ public function authenticateWithToken(TokenInterface $token, Request $request/*,
      * @param AuthenticatorInterface $guardAuthenticator
      * @param string                 $providerKey        The provider (i.e. firewall) key
      *
-     * @return null|Response
+     * @return Response|null
      */
     public function handleAuthenticationSuccess(TokenInterface $token, Request $request, GuardAuthenticatorInterface $guardAuthenticator, $providerKey)
     {
@@ -120,7 +120,7 @@ public function authenticateUserAndHandleSuccess(UserInterface $user, Request $r
      * @param AuthenticatorInterface  $guardAuthenticator
      * @param string                  $providerKey             The key of the firewall
      *
-     * @return null|Response
+     * @return Response|null
      */
     public function handleAuthenticationFailure(AuthenticationException $authenticationException, Request $request, GuardAuthenticatorInterface $guardAuthenticator, $providerKey)
     {