Make the esi-parse torture logic part of the esi_parser code

so it applies to all fetch methods.

bin/varnishd/cache_esi_deliver.c

@@ -259,4 +259,3 @@ ESI_Deliver(struct sess *sp)
 	}
 	(void)WRW_Flush(sp->wrk);
 }
-

bin/varnishd/cache_esi_fetch.c

@@ -64,17 +64,7 @@ vfp_esi_bytes_uu(struct sess *sp, struct http_conn *htc, size_t bytes)
 		w = HTC_Read(htc, st->ptr + st->len, l);
 		if (w <= 0)
 			return (w);
-		if (params->esi_syntax & 0x8) {
-			ssize_t d;
-			for (l = 0; l < w; l += d)  {
-				d = (random() & 3) + 1;
-				if (l + d >= w)
-					d = 1;
-				VEP_parse(sp,
-				    (const char *)st->ptr + st->len + l, d);
-			}
-		} else
-			VEP_parse(sp, (const char *)st->ptr + st->len, w);
+		VEP_parse(sp, (const char *)st->ptr + st->len, w);
 		st->len += w;
 		sp->obj->len += w;
 		bytes -= w;

bin/varnishd/cache_esi_parse.c

@@ -539,8 +539,8 @@ vep_do_include(struct vep_state *vep, enum dowhat what)
  * NB: the state-machine.  Please maintain it along with the code.
  */
 
-void
-VEP_parse(const struct sess *sp, const char *p, size_t l)
+static void
+vep_parse_int(const struct sess *sp, const char *p, size_t l)
 {
 	struct vep_state *vep;
 	const char *e;
@@ -965,6 +965,21 @@ VEP_parse(const struct sess *sp, const char *p, size_t l)
 		vep_mark_pending(vep, p);
 }
 
+void
+VEP_parse(const struct sess *sp, const char *p, size_t w)
+{
+	ssize_t l, d;
+
+	if (params->esi_syntax & 0x8) {
+		for (l = 0; l < w; l += d)  {
+			d = (random() & 3) + 1;
+			if (l + d >= w)
+				d = 1;
+			vep_parse_int(sp, p + l, d);
+		}
+	} else
+		vep_parse_int(sp, p, w);
+}
 
 /*---------------------------------------------------------------------
  */