Merge branch '4.4' into 5.2

* 4.4:
  [Security] Add missing Spanish translations
  [Security] Update Czech translations
  Expand `LockConflictedException` docs

Author: derrabus

Exception/LockConflictedException.php

@@ -11,9 +11,13 @@
 
 namespace Symfony\Component\Lock\Exception;
 
+use Symfony\Component\Lock\Lock;
+
 /**
  * LockConflictedException is thrown when a lock is acquired by someone else.
  *
+ * In non-blocking mode it is caught by {@see Lock::acquire()} and {@see Lock::acquireRead()}.
+ *
  * @author Jérémy Derussé <jeremy@derusse.com>
  */
 class LockConflictedException extends \RuntimeException implements ExceptionInterface