Merge branch '4.4' into 5.1

* 4.4:
  [HttpFoundation] Drop int return type from parseFilesize()
  Added $translator->addLoader()
  bug symfony/symfony#39878 [doctrine-bridge] Add username to UserNameNotFoundException
  fix spelling
  Add check for constant in Curl client
  Revert #38614, add assert to avoid regression
  Fix problem when SYMFONY_PHPUNIT_VERSION is empty string value
  Update PHP CS Fixer config to v2.18

Author: derrabus

Security/LdapUserProvider.php

@@ -73,18 +73,27 @@ public function loadUserByUsername(string $username)
             $query = str_replace('{username}', $username, $this->defaultSearch);
             $search = $this->ldap->query($this->baseDn, $query);
         } catch (ConnectionException $e) {
-            throw new UsernameNotFoundException(sprintf('User "%s" not found.', $username), 0, $e);
+            $e = new UsernameNotFoundException(sprintf('User "%s" not found.', $username), 0, $e);
+            $e->setUsername($username);
+
+            throw $e;
         }
 
         $entries = $search->execute();
         $count = \count($entries);
 
         if (!$count) {
-            throw new UsernameNotFoundException(sprintf('User "%s" not found.', $username));
+            $e = new UsernameNotFoundException(sprintf('User "%s" not found.', $username));
+            $e->setUsername($username);
+
+            throw $e;
         }
 
         if ($count > 1) {
-            throw new UsernameNotFoundException('More than one user found.');
+            $e = new UsernameNotFoundException('More than one user found.');
+            $e->setUsername($username);
+
+            throw $e;
         }
 
         $entry = $entries[0];