[master] 40b6f254e fix rfc reference

[Nils Goroll]

commit 40b6f254ef68d4c5020c82d113b68e974d6c7e66
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Wed Oct 14 12:54:24 2020 +0200

    fix rfc reference

diff --git a/bin/varnishd/cache/cache_vrt.c b/bin/varnishd/cache/cache_vrt.c
index 25fb07fd8..ceb6f3441 100644
--- a/bin/varnishd/cache/cache_vrt.c
+++ b/bin/varnishd/cache/cache_vrt.c
@@ -590,7 +590,7 @@ VRT_UpperLowerStrands(VRT_CTX, VCL_STRANDS s, int up)
 	return (r);
 }
 
-// RFC7232, 3.2 without obsolete line folding:
+// rfc7230,l,1243,1244
 // ASCII VCHAR + TAB + obs-text (0x80-ff)
 static inline VCL_BOOL
 validhdr(const char *p)