增加ssl_stream_dump_info函数，输出ssl版本号、sni，以进一步定位 #116

platform/src/ssl_stream.cpp

@@ -886,6 +886,12 @@ struct bufferevent * ssl_upstream_create_result_release_bev(future_result_t * re
 	ctx->bev = NULL;                                //giveup ownership
 	return ret;
 }
+const char* ssl_stream_dump_info(struct ssl_stream *stream, char* buffer, size_t sz)
+{
+	snprintf(buffer, sz, "%s:%s", SSL_get_version(stream->ssl),
+								stream->dir==CONN_DIR_UPSTREAM ? stream->client_hello->sni:NULL);
+	return buffer;
+}
 void ssl_stream_log_error(struct bufferevent * bev, enum tfe_conn_dir dir, struct ssl_mgr* mgr)
 {
 	unsigned long sslerr=0;