[MCL-6439] Downloading old servers doesn't work from the launcher

In the new launcher, you can download legacy (or latest) server files directly. However it doesn't work for server files up to (including) release 1.2.4.

The error you get from the browser:

<Error>
  <Code>AccessDenied</Code>
  <Message>Access Denied</Message>
  <RequestId>B56EAA6DAB0774DB</RequestId>
  <HostId>
    7CtFK5BkWpT1Z1/JMwLrE+erRX8HRuGpHFXJmAbv6ahZZN27mCnB4RIsIz0wpfGtFeJj9HRCjfw=
  </HostId>
</Error>