ComboSecurityScheme referencing yet another ComboSecurityScheme

[danielpeintner]

Coming from eclipse-thingweb/node-wot#1417 (comment)

There are essentially 2 questions:

1. Is it possible for a ComboSecurityScheme to reference another ComboSecurityScheme ?
2. What about possible infinite loops?

[egekorkan]

I would suggest adding an assertion to restrict it and not allow referencing a combo scheme from a combo scheme. It is not that used and in OpenAPI, you cannot combine more than one layer.

[egekorkan]

I take back my comment. @erossignon has given a concrete use case at eclipse-thingweb/node-wot#1417 (comment) . It is like saying TLS1.2 OR TLS1.3 AND requiring BasicAuth on top of both.