MINOR: quic: Implement ->pacing_delay_ns cc callback for newreno

This callback returns the pacing delay in nanoseconds between packet (or bursts)
to be sent. This is what is computed by quic_pacing_ns_pkt().

Author: haproxyFred

src/quic_cc_newreno.c

@@ -25,6 +25,7 @@
 #include <haproxy/chunk.h>
 #include <haproxy/quic_cc.h>
 #include <haproxy/quic_conn-t.h>
+#include <haproxy/quic_pacing.h>
 #include <haproxy/quic_trace.h>
 #include <haproxy/trace.h>
 
@@ -206,6 +207,11 @@ static void quic_cc_nr_hystart_start_round(struct quic_cc *cc, uint64_t pn)
 {
 }
 
+unsigned long long quic_cc_nr_pacing_delay_ns(const struct quic_cc *cc)
+{
+	return quic_pacing_ns_pkt(&cc->qc->qcc->tx.pacer);
+}
+
 static void (*quic_cc_nr_state_cbs[])(struct quic_cc *cc,
                                       struct quic_cc_event *ev) = {
 	[QUIC_CC_ST_SS] = quic_cc_nr_ss_cb,
@@ -226,6 +232,7 @@ struct quic_cc_algo quic_cc_algo_nr = {
 	.event       = quic_cc_nr_event,
 	.slow_start  = quic_cc_nr_slow_start,
 	.hystart_start_round = quic_cc_nr_hystart_start_round,
+	.pacing_delay_ns = quic_cc_nr_pacing_delay_ns,
 	.state_trace = quic_cc_nr_state_trace,
 };