Merge branch '3.1'

* 3.1:
  [TwigBundle] Removed redundant return statement.
  enable property info
  [Cache] Fix default lifetime being ignored
  [DependencyInjection] Fixed deprecated default message template with XML
  Reference the actual location of the documentation
  [TwigBridge] Removed extra arguments in 2 places.
  [Cache] Fix incorrect timestamps generated by FilesystemAdapter
  [Process] Fix write access check for pipes on Windows
  [HttpKernel] Use flock() for HttpCache's lock files

Conflicts:
	src/Symfony/Component/Cache/Adapter/FilesystemAdapter.php

Author: nicolas-grekas

README.md

@@ -14,7 +14,7 @@ previous version of the component will break with this version.
 Resources
 ---------
 
-  * [Documentation](https://symfony.com/doc/current/components/ldap/index.html)
+  * [Documentation](https://symfony.com/doc/current/components/ldap)
   * [Contributing](https://symfony.com/doc/current/contributing/index.html)
   * [Report issues](https://github.com/symfony/symfony/issues) and
     [send Pull Requests](https://github.com/symfony/symfony/pulls)