Better handling of various per-server ssl options with SNI. SSL_set_SSL_CTX() doesn't touch values cached within ssl connection structure, it only changes certificates (at least as of now, OpenSSL 1.0.0d and earlier). As a result settings like ssl_verify_client, ssl_verify_depth, ssl_prefer_server_ciphers are only configurable on per-socket basis while with SNI it should be possible to specify them different for two servers listening on the same socket. Workaround is to explicitly re-apply settings we care about from context to ssl connection in servername callback. Note that SSL_clear_options() is only available in OpenSSL 0.9.8m+. I.e. with older versions it is not possible to clear ssl_prefer_server_ciphers option if it's set in default server for a socket.