OAuth support for OPDS #514

I work at eBooks.com (but am not a developer, so apologies for non-technical language). A customer wanted to import their OPDS catalog in to FBReader, but got the error: Authentication scheme "" is not supported

We use OAuth. We list the supported authentication methods for public OPDS clients when we issue the unauthorised response (this is part of the OPDS spec)
You can see it here https://library.ebooks.com/v1/library
At the moment there's a single Implicit Auth option in the authentication array.

It would be great if FBreader could support OAuth.