* 2.8: (40 commits)
Show exception is checked twice in ExceptionController of twig
allow SSI fragments configuration in XML files
Display a better error message when the toolbar cannot be displayed
render hidden _method field in form_rest()
return fallback locales whenever possible
[Console] Fix catching exception type in QuestionHelper
[WebProfilerBundle] Eliminate line wrap on count columnt (routing)
[Routing] Fix XmlFileLoader exception message
[Translation] Fix FileLoader::loadResource() php doc
Sessions: configurable "use_strict_mode" option for NativeSessionStorage
[FrameworkBundle] [Command] Clean bundle directory, fixes#23177
Reset redirectCount when throwing exception
[TwigBundle] Remove template.xml services when templating is disabled
add content-type header on exception response
Embedding a response that combines expiration and validation, that should not defeat expiration on the combined response
Fix two edge cases in ResponseCacheStrategy
[Routing] Expose request in route conditions, if needed and possible
[Routing] Expose request in route conditions, if needed and possible
[Translation][FrameworkBundle] Fix resource loading order inconsistency reported in #23034
[Filesystem] added workaround in Filesystem::rename for PHP bug
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