Merge branch '3.4' into 4.3

* 3.4: [Filesystem] [Serializer] fixes English grammar typo [Monolog Bridge] Fixed accessing static property as non static. Improve Symfony description [Validator] Add Japanese translation Remove some unused methods parameters Avoid empty \"If-Modified-Since\" header in validation request [Validator] ConstraintValidatorTestCase: add missing return value to mocked validate method calls

Author: fabpot

Command/ServerLogCommand.php

@@ -114,7 +114,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
  continue;
  }
 
- $this->displayLog($input, $output, $clientId, $record);
+ $this->displayLog($output, $clientId, $record);
  }
  }
 
@@ -141,7 +141,7 @@ private function getLogs($socket)
  }
  }
 
- private function displayLog(InputInterface $input, OutputInterface $output, $clientId, array $record)
+ private function displayLog(OutputInterface $output, $clientId, array $record)
  {
  if ($this->handler->isHandling($record)) {
  if (isset($record['log_id'])) {