Merge branch '3.4' into 4.0

* 3.4:
  [DI] Add missing deprecation when fetching private services from ContainerBuilder
  [FrameworkBundle] Rename getDotEnvVars to getDotenvVars
  [DI] Fix false-positive circular exception
  Use a more specific file for detecting the bridge
  [HttpKernel] Fix issue when resetting DumpDataCollector
  bumped Symfony version to 3.4.1
  updated VERSION for 3.4.0
  updated CHANGELOG for 3.4.0

Author: nicolas-grekas

Command/AboutCommand.php

@@ -90,7 +90,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             array('Xdebug', extension_loaded('xdebug') ? 'true' : 'false'),
         );
 
-        if ($dotenv = self::getDotEnvVars()) {
+        if ($dotenv = self::getDotenvVars()) {
             $rows = array_merge($rows, array(
                 new TableSeparator(),
                 array('<info>Environment (.env)</>'),
@@ -129,7 +129,7 @@ private static function isExpired(string $date): bool
         return false !== $date && new \DateTime() > $date->modify('last day of this month 23:59:59');
     }
 
-    private static function getDotEnvVars(): array
+    private static function getDotenvVars(): array
     {
         $vars = array();
         foreach (explode(',', getenv('SYMFONY_DOTENV_VARS')) as $name) {