Version 5.4.1

- Fixes a spurious "no service account username is provided" warning from the connectivity tool when using Windows integrated authentication (SSPI). - Now reports the error code during SSPI negotiation failure. - Strips leading or trailing whitespace from RADIUS usernames during radius_iframe authentications. - Restricts access to the Authentication Proxy bin folder on Windows at installation. - Upgrades a third-party library to address memory leaks during authentications.