[ticket/12685] New CLI container for load extensions

https://tracker.phpbb.com/browse/PHPBB3-12685

PHPBB3-12685
I found the problem. It is very stupid!

In file phpbbcli.php, we check for option 'safe-mode' during container building, but we add it with addOption during initialization of $application.

For example, this works:
```
$definition = new InputDefinition();
$definition->addOption(new InputOption(
	'safe-mode',
	null,
	InputOption::VALUE_NONE,
	'safe mode'
));

$input = new ArgvInput(null, $definition);

if ($input->getOption('safe-mode'))
{
	$phpbb_container_builder->set_use_extensions(false);
	$phpbb_container_builder->set_dump_container(false);
}
```

But I think that this is not a good solution.