performance fix, replace alt domain suffix in client login

 		Util::emitHook(

 			'\OCA\Files_Sharing\API\Server2Server',

 			'preLoginNameUsedAsUserName',

--- ./lib/private/User/Session.php	2022-08-10 15:39:33.131890282 +0530

+++ ./lib/private/User/Session-new.php	2022-08-10 15:48:23.236165783 +0530

@@ -438,7 +438,11 @@

 								IRequest $request,

 								OC\Security\Bruteforce\Throttler $throttler) {

 		$currentDelay = $throttler->sleepDelay($request->getRemoteAddress(), 'login');

-

+		

+		$altDomain = $this->config->getSystemValue('alt_mail_domain', '');

+		$altDomainSuffix = !empty($altDomain) ? '@' . $altDomain : '';

+		$user = str_replace($altDomainSuffix, '', $user);

+		

 		if ($this->manager instanceof PublicEmitter) {

 			$this->manager->emit('\OC\User', 'preLogin', [$user, $password]);

 		}