[stunnel-users] Using stunnel to secure clients instead of servers

Hi, this may be a slightly unusual request, but I was curious if stunnel could be used for securing clients that do not support TLS, to connect to services that optionally support TLS.

So, really, stunnel already does almost everything that would be needed; except that in this use case, it would be listening for incoming unencrypted connections, and then serve as a proxy to an encrypted connection to the actual service. While it might be nice to offer certificate-based authentication options in this scenario, it wouldn't be necessary for my intended use case, so stunnel wouldn't need access to any private certificates. However, certificate pinning would be pretty essential to what I have in mind.

Best, Leon.