TYPO3 Core

In AbstractUserAuthentication there is a workaround to send special cache headers for MSIE webbrowsers. The user agent MSIE has been used by Microsoft Internet Explorer up to version 10 and the target version for the workaround seem to be MSIE 5.0.1 - 8 as mentioned in the linked Microsoft knowledgebase article (https://support.microsoft.com/en-us/help/323308/internet-explorer-file-downloads-over-ssl-do-not-work-with-the-cache-c).

Since TYPO3 10.4+ only supports modern webbrowsers and the workaround only steps in for Internet Explorer up to version 10 (end of vendor support 01/2020), the workaround should be removed.