TYPO3 Core

This used to be fixed. The code has changed a bit in the meantime and is now located at /typo3/sysext/core/Classes/Utility/GeneralUtility.php:3448

There it says:

                if ($proxySSL == '*') {
                    $proxySSL = $GLOBALS['TYPO3_CONF_VARS']['SYS']['reverseProxyIP'];
                }
                if (self::cmpIP($_SERVER['REMOTE_ADDR'], $proxySSL)) {
                    $retVal = TRUE;
                } else {
                    $retVal = $_SERVER['SSL_SESSION_ID'] || strtolower($_SERVER['HTTPS']) === 'on' || (string)$_SERVER['HTTPS'] === '1' ? TRUE : FALSE;
                }
                break;

So your patch is more or less included. This is why I solve this issue. If you think that this issue is not fixed yet, please be so kind and reopen a new task!