[master] 19785d6bb make the max PROXY payload length more explicit

[Nils Goroll]

commit 19785d6bb8a467bb979b8a3ebe7dd804afe4c0ca
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Dec 28 18:39:11 2020 +0100

    make the max PROXY payload length more explicit

diff --git a/bin/varnishd/proxy/cache_proxy_proto.c b/bin/varnishd/proxy/cache_proxy_proto.c
index c31fb6131..870c84130 100644
--- a/bin/varnishd/proxy/cache_proxy_proto.c
+++ b/bin/varnishd/proxy/cache_proxy_proto.c
@@ -45,6 +45,9 @@
 #include "vss.h"
 #include "vtcp.h"
 
+// max. PROXY payload length (excl. sig) - XXX parameter?
+#define VPX_MAX_LEN 1024
+
 struct vpx_tlv {
 	unsigned		magic;
 #define VPX_TLV_MAGIC		0xdeb9a4a5
@@ -532,9 +535,8 @@ vpx_new_session(struct worker *wrk, void *arg)
 	assert(sizeof vpx2_sig == 12);
 
 	HTC_RxInit(req->htc, req->ws);
-	hs = HTC_RxStuff(req->htc, vpx_complete,
-	    NULL, NULL, NAN, sp->t_idle + cache_param->timeout_idle, NAN,
-	    1024);			// XXX ?
+	hs = HTC_RxStuff(req->htc, vpx_complete, NULL, NULL, NAN,
+	    sp->t_idle + cache_param->timeout_idle, NAN, VPX_MAX_LEN);
 	if (hs != HTC_S_COMPLETE) {
 		Req_Release(req);
 		SES_DeleteHS(sp, hs, NAN);