[stunnel-users] protocols options clarification

The Service Level Options of the manual includes the following points:

protocol = proto application protocol to negotiate SSL (e.g. starttls or stls) protocol option should not be used with SSL encryption on a separate port. Currently supported protocols: CIFS

Connect

Etc..

However, in the listed protocols supported neither "starttls" or "stls" appears, even though they appear to be options as far as I can see from the above explanation. Am I missing something here, or should they be among those in the list, and can one use this setting:

Protocol=starttls

Also, I don't really understand what this statement is telling me: "protocol option should not be used with SSL encryption on a separate port."

John A. Wallace