stream_index = servers->lookup_stream_by_url(stream_config.url);
assert(stream_index != -1);
servers->set_backlog_size(stream_index, stream_config.backlog_size);
stream_index = servers->lookup_stream_by_url(stream_config.url);
assert(stream_index != -1);
servers->set_backlog_size(stream_index, stream_config.backlog_size);