[Request] Jottacloud 2FA

While trying to answer #4232, I discovered Changes to Jottacloud authentication. OpenID Connect mentions “Multi-factor authentication” among its potential future benefits, but I wondered if there are also compatibility impacts from this on third party software like JaFS (whose Jottacloud background info helped) and Duplicati.

Because @albertony seems central to both of those packages (thanks!), let me see if I can get an opinion.