MINOR: mux-h2/trace: report h2s->id before h2c->dsi for the stream ID

h2c->dsi is only for demuxing, and needed while decoding a new request.
But if we already have a valid stream ID (e.g. response or outgoing
request), we should use it instead. This avoids seeing [0] in front of
the responses at user level.
1 file changed