Merge branch '5.1' into 5.2

* 5.1:
  [HttpFoundation] Drop int return type from parseFilesize()
  Added $translator->addLoader()
  bug symfony/symfony#39878 [doctrine-bridge] Add username to UserNameNotFoundException
  [Uid] Clarify the format returned by getTime()
  fix spelling
  Add check for constant in Curl client
  Revert #38614, add assert to avoid regression
  Fix container injection with TypedReference
  Fix problem when SYMFONY_PHPUNIT_VERSION is empty string value
  Update PHP CS Fixer config to v2.18

Author: derrabus

Security/User/EntityUserProvider.php

@@ -62,7 +62,10 @@ public function loadUserByUsername(string $username)
         }
 
         if (null === $user) {
-            throw new UsernameNotFoundException(sprintf('User "%s" not found.', $username));
+            $e = new UsernameNotFoundException(sprintf('User "%s" not found.', $username));
+            $e->setUsername($username);
+
+            throw $e;
         }
 
         return $user;
@@ -92,7 +95,10 @@ public function refreshUser(UserInterface $user)
 
             $refreshedUser = $repository->find($id);
             if (null === $refreshedUser) {
-                throw new UsernameNotFoundException('User with id '.json_encode($id).' not found.');
+                $e = new UsernameNotFoundException('User with id '.json_encode($id).' not found.');
+                $e->setUsername(json_encode($id));
+
+                throw $e;
             }
         }