[Process] clarify idle timeout
Merge branch '2.4'

* 2.4: (35 commits)
  Update validators.ro.xlf
  add non-standard port to HTTP_HOST
  fixed attribute "source-language" for translations
  [Process] clarify idle timeout
  [Security] fix DI for SimpleFormAuthenticationListener
  Update PluralizationRules.php
  Update validators.pt_BR.xlf
  Translated remaining items (57-72)
  Updated Vietnamese translation
  allow null value in fragment handler
  added missing dot in translation
  updated Arabic translations
  Update validators.id.xlf
  [Validator] Translate validator messages into Brazilian Portuguese
  Added more Swedish validator translations
  Update validators.ca.xlf
  fixed typos in Welsh translation
  Added missing Croatian translations
  [Form] fixed allow render 0 and 0.0 numeric input values
  Fixed validators.nl.xlf
  ...

Conflicts:
	src/Symfony/Bridge/Twig/composer.json