Extract of SSL_CTX_new manual page:


SSLv23_method(void), SSLv23_server_method(void), SSLv23_client_method(void)

  A TLS/SSL connection established with these methods will understand
  the SSLv2, SSLv3, and TLSv1 protocol. A client will send out SSLv2
  client hello messages and will indicate that it also understands
  SSLv3 and TLSv1. A server will understand SSLv2, SSLv3, and TLSv1
  client hello messages. This is the best choice when compatibility
  is a concern.

I don't think that "Client protocol SSLv23 succeeded with server protocol SSLv3" or "Client protocol SSLv23 succeeded with server protocol TLSv1" are errors.