允许暂时禁用某些功能。 Useful for large site operators to push people to newer APIs while still keeping the breakage short and contained. 这应当是一个数组，其中键是一个功能名称，值是“关闭”数组的一个数组，其每个数组均包含以下键：

• 'start' - Shutdown start, parsed with strtotime(). (required)
• 'end' - Shutdown end, parsed with strtotime(). (required)
• 'percentage' - Number between 0 and 100. If set, only a certain percentage of requests will be blocked.

For example:

$wgFeatureShutdown = [
	'pre-1.24-tokens' => [
		[
			'start' => '2021-07-01T00:00 +00:00',
			'end' => '2021-08-01T00:00 +00:00',
			'percentage' => 50,
		],
	],
];