EWebDAVDiscover: Can skip lookup for books with /.well-known/carddav address
I set up a new collection account for email address aaa@milter.aegee.org and under Advanced I enter as server mail.aegee.org . The password is abc (and there are two different users with that password: aaa@milter.aegee.org is the one user and aaa@aegee.org⇔aaa is the second user).
Evolution asks for the password when doing CalDAV/CardDAV discovery. It calls PROPFIND /dav/addressbooks and obtains the current principle, but does does not query the principle for addressbooks-home-sets.
So at the end of the discovery, a CalDAV server is found, but a CardDAV server is not found.
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