[master] f25f08a57 http2: Update rfc references

[Nils Goroll]

commit f25f08a57d2a372cca6e7515d8f6f2c1236de867
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Thu Feb 27 12:12:25 2025 +0100

    http2: Update rfc references

diff --git a/bin/varnishd/http2/cache_http2_proto.c b/bin/varnishd/http2/cache_http2_proto.c
index b3d6e7397..3ef036145 100644
--- a/bin/varnishd/http2/cache_http2_proto.c
+++ b/bin/varnishd/http2/cache_http2_proto.c
@@ -464,6 +464,8 @@ h2_rx_window_update(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
 
 /**********************************************************************
  * Incoming PRIORITY, possibly an ACK of one we sent.
+ *
+ * deprecated, rfc9113,l,1103,1104
  */
 
 static h2_error v_matchproto_(h2_rxframe_f)
@@ -737,7 +739,7 @@ h2_rx_headers(struct worker *wrk, struct h2_sess *h2, struct h2_req *r2)
 
 	if (r2 != NULL) {
 		H2S_Lock_VSLb(h2, SLT_SessError, "H2: rx headers on non-idle stream");
-		return (H2CE_PROTOCOL_ERROR);	// XXX spec ?
+		return (H2CE_PROTOCOL_ERROR);	// rfc9113,l,887,891
 	}
 
 	if (h2->rxf_stream <= h2->highest_stream) {