Merge branch '4.4' into 5.0

* 4.4: (30 commits)
  [Security] Check UserInterface::getPassword is not null before calling needsRehash
  gracefully handle missing event dispatchers
  Fix TokenStorage::reset not called in stateless firewall
  [DotEnv] Remove `usePutEnv` property default value
  [HttpFoundation] get currently session.gc_maxlifetime if ttl doesnt exists
  Set up typo fix
  [DependencyInjection] Handle env var placeholders in CheckTypeDeclarationsPass
  [Cache] fix memory leak when using PhpArrayAdapter
  [Validator] Allow underscore character "_" in URL username and password
  [TwigBridge] Update bootstrap_4_layout.html.twig
  [FrameworkBundle][SodiumVault] Create secrets directory only when needed
  fix parsing negative octal numbers
  [SecurityBundle] Passwords are not encoded when algorithm set to \"true\"
  [DependencyInjection] Resolve expressions in CheckTypeDeclarationsPass
  [SecurityBundle] Properly escape regex in AddSessionDomainConstraintPass
  do not validate passwords when the hash is null
  [DI] fix resolving bindings for named TypedReference
  [Config] never try loading failed classes twice with ClassExistenceResource
  [Mailer] Fix SMTP Authentication when using STARTTLS
  [DI] Fix making the container path-independent when the app is in /app
  ...

Author: nicolas-grekas

Session/Storage/Handler/RedisSessionHandler.php

@@ -63,7 +63,7 @@ public function __construct($redis, array $options = [])
 
         $this->redis = $redis;
         $this->prefix = $options['prefix'] ?? 'sf_s';
-        $this->ttl = $options['ttl'] ?? (int) ini_get('session.gc_maxlifetime');
+        $this->ttl = $options['ttl'] ?? null;
     }
 
     /**
@@ -79,7 +79,7 @@ protected function doRead(string $sessionId): string
      */
     protected function doWrite(string $sessionId, string $data): bool
     {
-        $result = $this->redis->setEx($this->prefix.$sessionId, $this->ttl, $data);
+        $result = $this->redis->setEx($this->prefix.$sessionId, (int) ($this->ttl ?? ini_get('session.gc_maxlifetime')), $data);
 
         return $result && !$result instanceof ErrorInterface;
     }
@@ -115,6 +115,6 @@ public function gc($maxlifetime): bool
      */
     public function updateTimestamp($sessionId, $data)
     {
-        return (bool) $this->redis->expire($this->prefix.$sessionId, $this->ttl);
+        return (bool) $this->redis->expire($this->prefix.$sessionId, (int) ($this->ttl ?? ini_get('session.gc_maxlifetime')));
     }
 }