Merge branch '5.1' into 5.2

* 5.1:
  Removed 3.3 DI changes article

Author: javiereguiluz

_build/redirection_map

@@ -510,3 +510,4 @@
 /components/mailer /mailer
 /messenger/message-recorder messenger/dispatch_after_current_bus
 /components/stopwatch https://github.com/symfony/stopwatch
+/service_container/3.3-di-changes https://symfony.com/doc/3.4/service_container/3.3-di-changes.html