[ticket/14039] Refactoring the updater
* CHItA/ticket/14039:
[ticket/14039] Use update helper to include files in container factory
[ticket/14039] Fix inclusion logic in update helper
[ticket/14039] Fix folder creation and deleted binary file issue
[ticket/14039] Fix file check for deleted files
[ticket/14039] Fix acp link
[ticket/14039] Fix ACP link generation
[ticket/14039] Fix constants for the updater
[ticket/14039] Include phpBB constants on startup
[ticket/14039] Fix migrator's language calls
[ticket/14039] Fix misunderstandable comment in the archive file updater
[ticket/14039] Use shared language service in the container factory
[ticket/14039] Fix filesystem file updater's mkdir usage
[ticket/14039] Only show log container when it has content
[ticket/14039] Use compatibility globals from the update package
[ticket/14039] Use http_exception instead of die()
[ticket/14039] Fix T_TEMPLATE_PATH constant
[ticket/14039] Fix language constants and comments
[ticket/14039] Revamp updater
