Merge branch '5.3' into 5.4

* 5.3:
  Add the missing redirections
  Deleting incomplete components page

Author: javiereguiluz

_build/redirection_map

@@ -514,6 +514,8 @@
 /service_container/3.3-di-changes https://symfony.com/doc/3.4/service_container/3.3-di-changes.html
 /frontend/encore/shared-entry /frontend/encore/split-chunks
 /testing/functional_tests_assertions /testing#testing-application-assertions
+/components https://symfony.com/components
+/components/index https://symfony.com/components
 /logging/monolog_regex_based_excludes /logging/monolog_exclude_http_codes
 /security/named_encoders /security/named_hashers
 /security/experimental_authenticators /security/authenticator_manager