[stunnel-users] Which X.509 certificate types (.crt, .pem, .der .p7c) possible for stunnel and how to import them?

[Ben Stover]

Which X.509 certificate types (e.g.  .crt, .pem, .der .p7c) are possible for stunnel?

Assume I have got such a certificate as separate file (and not retrieved by OpenSSL).

How do I import it into stunnel?

Do I have to just copy it into (which ?) directory?

Does the certifcate file name have to have a certain pattern?
Or is stunnel smart enough to read and analyze the content independently from filename?

Thank you
Ben