[ncsa] with flags, show the whole record

bin/varnishncsa/varnishncsa.c

@@ -971,8 +971,10 @@ dispatch_f(struct VSL_data *vsl, struct VSL_transaction * const pt[],
 
 			b = VSL_CDATA(t->c->rec.ptr);
 			e = b + VSL_LEN(t->c->rec.ptr);
-			while (e > b && e[-1] == '\0')
-				e--;
+			if (!VSL_tagflags[tag]) {
+				while (e > b && e[-1] == '\0')
+					e--;
+			}
 
 			switch (tag) {
 			case SLT_HttpGarbage:

bin/varnishtest/tests/u00017.vtc

@@ -23,7 +23,7 @@ client c1 {
 # Let's fist create a script to reduce in all the variants below.
 
 shell {
-	varnishncsa -d -n ${v1_name} -F '%{VSL:Debug}x' -j | grep "^cookie: nothing to parse$"
+	varnishncsa -d -n ${v1_name} -F '%{VSL:Debug}x' -j | grep "^cookie: nothing to parse\\\\u0000"
 }
 
 shell -err -expect "Tag Debug can contain control characters" {