What I'm trying to archive is enable ECDSA and DSS ciphers in my site, but at the same time not depend just of self signed certificates, so I could sent to my client more than one certificate and them could select ECDSA and DSS over RSA if they can verify my self signed certificate, and if not, fall back to a CA signed certificate and refuse ECDSA and DSS.
Strictly speaking, the server can send an arbitrary number of certificates to the client, as part of its
Therefore, a really compliant server cannot send a choice of certificates to the client, and cannot expect clients to use any other certificate than the first one they send.
For signature algorithm support, there is a standard TLS extension specified in section 22.214.171.124.1, by which the client can tell to the server, early in the handshake (in the
(In practice, support for this extension is not yet widespread. But, also in practice, everybody uses RSA and supports RSA.)