Merge branch '3.4' into 4.0

* 3.4: (22 commits)
  [DI] Add tests for EnvVarProcessor
  [Bridge\PhpUnit] Fix #26430 Cannot autoload listeners
  Make sure we always render errors. Eventhough labels are disabled
  Make sure form errors is valid HTML
  [HttpKernel] Allow generators in registerBundle
  [TwigBundle] document TwigRenderer BC break in UPGRADE-3.4
  Extra line to bootstrap 3 horizontal layout
  [Serializer] Remove const override
  Update Client.php
  [PhpUnitBridge] Ability to use different composer.json file
  [DomCrawler] FormField: remove an useless return statement
  [Config] ReflectionClassResource check abstract ServiceSubscriberInterface and EventSubscriberInterface
  Display the Welcome Page when there is no homepage defined
  fix regression when extending the Container class without a constructor
  fix the updating of timestamp in the MemcachedSessionHandler
  [SecurityBundle] Make extra character non mandatory in regex
  [Config] Add characters to the regex
  bumped Symfony version to 3.4.7
  updated VERSION for 3.4.6
  updated CHANGELOG for 3.4.6
  ...

Author: nicolas-grekas

Client.php

@@ -78,7 +78,7 @@ public function isFollowingRedirects()
     }
 
     /**
-     * Sets the maximum number of requests that crawler can follow.
+     * Sets the maximum number of redirects that crawler can follow.
      *
      * @param int $maxRedirects
      */
@@ -89,7 +89,7 @@ public function setMaxRedirects($maxRedirects)
     }
 
     /**
-     * Returns the maximum number of requests that crawler can follow.
+     * Returns the maximum number of redirects that crawler can follow.
      *
      * @return int
      */