Fix IPv6 localhost regex

Signed-off-by: J0WI <J0WI@users.noreply.github.com>

lib/private/AppFramework/Http/Request.php

@@ -75,7 +75,7 @@ class Request implements \ArrayAccess, \Countable, IRequest {
 	// Android Chrome user agent: https://developers.google.com/chrome/mobile/docs/user-agent
 	public const USER_AGENT_ANDROID_MOBILE_CHROME = '#Android.*Chrome/[.0-9]*#';
 	public const USER_AGENT_FREEBOX = '#^Mozilla/5\.0$#';
-	public const REGEX_LOCALHOST = '/^(127\.0\.0\.1|localhost|::1)$/';
+	public const REGEX_LOCALHOST = '/^(127\.0\.0\.1|localhost|\[::1\])$/';
 
 	/**
 	 * @deprecated use \OCP\IRequest::USER_AGENT_CLIENT_IOS instead