Collaps the backend TCP pools to only identify by {IPv4+IPv6}

bin/varnishd/cache/cache_backend.h

@@ -116,7 +116,7 @@ void VBP_Remove(struct backend *b, struct vrt_backend_probe const *p);
 void VBP_Use(const struct backend *b, const struct vrt_backend_probe *p);
 void VBP_Summary(struct cli *cli, const struct vbp_target *vt);
 
-struct tcp_pool *VBT_Ref(const char *name, const struct suckaddr *ip4,
+struct tcp_pool *VBT_Ref(const struct suckaddr *ip4,
     const struct suckaddr *ip6);
 void VBT_Rel(struct tcp_pool **tpp);
 int VBT_Open(const struct tcp_pool *tp, double tmo, const struct suckaddr **sa);

bin/varnishd/cache/cache_backend_cfg.c

@@ -103,8 +103,7 @@ VBE_AddBackend(const char *vcl, const struct vrt_backend *vb)
 	b->ipv6_addr = vb->ipv6_addr;
 	b->port = vb->port;
 
-	b->tcp_pool = VBT_Ref(vb->vcl_name,
-	    vb->ipv4_suckaddr, vb->ipv6_suckaddr);
+	b->tcp_pool = VBT_Ref(vb->ipv4_suckaddr, vb->ipv6_suckaddr);
 
 	/*
 	 * Copy over the sockaddrs

bin/varnishd/cache/cache_backend_tcp.c

@@ -131,21 +131,18 @@ tcp_handle(struct waited *w, enum wait_event ev, double now)
 }
 
 /*--------------------------------------------------------------------
- * Reference a TCP pool given by {name, ip4, ip6} triplet.  Create if
- * it doesn't exist already.
+ * Reference a TCP pool given by {ip4, ip6} pair.  Create if it
+ * doesn't exist already.
  */
 
 struct tcp_pool *
-VBT_Ref(const char *name, const struct suckaddr *ip4,
-    const struct suckaddr *ip6)
+VBT_Ref(const struct suckaddr *ip4, const struct suckaddr *ip6)
 {
 	struct tcp_pool *tp;
 
 	ASSERT_CLI();
 	VTAILQ_FOREACH(tp, &pools, list) {
 		assert(tp->refcnt > 0);
-		if (strcmp(tp->name, name))
-			continue;
 		if (ip4 == NULL) {
 			if (tp->ip4 != NULL)
 				continue;
@@ -170,7 +167,6 @@ VBT_Ref(const char *name, const struct suckaddr *ip4,
 
 	ALLOC_OBJ(tp, TCP_POOL_MAGIC);
 	AN(tp);
-	REPLACE(tp->name, name);
 	if (ip4 != NULL)
 		tp->ip4 = VSA_Clone(ip4);
 	if (ip6 != NULL)