MINOR: mux_quic: simplify MUX_CTL_GET_NBSTRM

Since the previous patch, accounting of HTTP requests in progress on MUX
QUIC as been simplified. Now QCC <nb_hreq> identifies them until the QCS
free.

Thus, MUX_CTL_GET_NBSTRM can be simplified. Instead of relying on
<nb_sc> plus the <opening_list>, simply return <nb_hreq> value which
should be slighly identical.

Author: a-denoyelle

src/mux_quic.c

@@ -4607,14 +4607,8 @@ static int qmux_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *ou
 	case MUX_CTL_GET_GLITCHES:
 		return qcc->glitches;
 
-	case MUX_CTL_GET_NBSTRM: {
-		struct qcs *qcs;
-		unsigned int nb_strm = qcc->nb_sc;
-
-		list_for_each_entry(qcs, &qcc->opening_list, el_opening)
-			nb_strm++;
-		return nb_strm;
-	}
+	case MUX_CTL_GET_NBSTRM:
+		return qcc->nb_hreq;
 
 	case MUX_CTL_GET_MAXSTRM:
 		return qcc->lfctl.ms_bidi_init;