Feature: #87726 - Extend FrontendLoginController Hook to validate password

See forge#87726

Description

The Hook $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['felogin']['password_changed'] is extended to validate the given password. In the Hook you can set a custom validation message.

Impact

You can now use the hook via:

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['felogin']['password_changed'][] = \Your\Namespace\Hooks\MyBeautifulHook::class . '->passwordChanged';
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Example implementation:

public function passwordChanged(array &$params)
{
    if($params['newPasswordUnencrypted']==='password'){
        $params['passwordValid']=FALSE;
        $params['passwordInvalidMessage']='<p class="text-danger">Do not use password as password</p>';
    }
}
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