Rename max_esi_includes param to max_esi_depth and enforce it again.

bin/varnishd/cache_esi_deliver.c

@@ -55,6 +55,10 @@ ved_include(struct sess *sp, const char *src, const char *host)
 
 	w = sp->wrk;
 
+	if (sp->esi_level >= params->max_esi_depth)
+		return;
+	sp->esi_level++;
+
 	if (WRW_Flush(w)) {
 		vca_close_session(sp, "remote closed");
 		return;
@@ -62,7 +66,6 @@ ved_include(struct sess *sp, const char *src, const char *host)
 
 	AZ(WRW_FlushRelease(w));
 
-	sp->esi_level++;
 	obj = sp->obj;
 	sp->obj = NULL;
 	res_mode = sp->wrk->res_mode;

bin/varnishd/heritage.h

@@ -136,7 +136,7 @@ struct params {
 	unsigned		max_restarts;
 
 	/* Maximum esi:include depth allowed */
-	unsigned		max_esi_includes;
+	unsigned		max_esi_depth;
 
 	/* ESI parser hints */
 	unsigned		esi_syntax;

bin/varnishd/mgt_param.c

@@ -647,11 +647,11 @@ static const struct parspec input_parspec[] = {
 		"Use 0x notation and do the bitor in your head :-)\n",
 		0,
 		"0", "bitmap" },
-	{ "max_esi_includes",
-		tweak_uint, &master.max_esi_includes, 0, UINT_MAX,
+	{ "max_esi_depth",
+		tweak_uint, &master.max_esi_depth, 0, UINT_MAX,
 		"Maximum depth of esi:include processing.\n",
 		0,
-		"5", "includes" },
+		"5", "levels" },
 	{ "cache_vbcs", tweak_bool,  &master.cache_vbcs, 0, 0,
 		"Cache vbc's or rely on malloc, that's the question.",
 		EXPERIMENTAL,