Roto-till the panic/backtrace output to use the VSB auto-indent.

Based largely on patch from:	Martin

I wonder if we should make the panic output (readable) JSON format ?

bin/varnishd/cache/cache_backend.c

@@ -319,17 +319,17 @@ vbe_panic(const struct director *d, struct vsb *vsb)
 	CHECK_OBJ_NOTNULL(d, DIRECTOR_MAGIC);
 	CAST_OBJ_NOTNULL(bp, d->priv, BACKEND_MAGIC);
 
-	VSB_printf(vsb, "      display_name = %s\n", bp->display_name);
+	VSB_printf(vsb, "display_name = %s\n", bp->display_name);
 	if (bp->ipv4_addr != NULL)
-		VSB_printf(vsb, "      ipv4 = %s\n", bp->ipv4_addr);
+		VSB_printf(vsb, "ipv4 = %s\n", bp->ipv4_addr);
 	if (bp->ipv6_addr != NULL)
-		VSB_printf(vsb, "      ipv6 = %s\n", bp->ipv6_addr);
-	VSB_printf(vsb, "      port = %s\n", bp->port);
-	VSB_printf(vsb, "      hosthdr = %s\n", bp->hosthdr);
-	VSB_printf(vsb, "      health=%s, admin_health=%s",
+		VSB_printf(vsb, "ipv6 = %s\n", bp->ipv6_addr);
+	VSB_printf(vsb, "port = %s\n", bp->port);
+	VSB_printf(vsb, "hosthdr = %s\n", bp->hosthdr);
+	VSB_printf(vsb, "health=%s, admin_health=%s",
 	    bp->healthy ? "healthy" : "sick", bp->admin_health);
 	VSB_printf(vsb, ", changed=%.1f\n", bp->health_changed);
-	VSB_printf(vsb, "      n_conn = %u\n", bp->n_conn);
+	VSB_printf(vsb, "n_conn = %u\n", bp->n_conn);
 }
 
 /*--------------------------------------------------------------------*/

bin/varnishd/cache/cache_director.c

@@ -187,10 +187,15 @@ VDI_Panic(const struct director *d, struct vsb *vsb, const char *nm)
 {
 	if (d == NULL)
 		return;
-	VSB_printf(vsb, "    %s = %p {\n", nm, d);
-	VSB_printf(vsb, "      vcl_name = %s\n", d->vcl_name);
-	VSB_printf(vsb, "      name = %s\n", d->name);
+	VSB_printf(vsb, "%s = %p {\n", nm, d);
+	VSB_indent(vsb, 2);
+	VSB_printf(vsb, "vcl_name = %s\n", d->vcl_name);
+	VSB_printf(vsb, "type = %s {\n", d->name);
+	VSB_indent(vsb, 2);
 	if (d->panic != NULL)
 		d->panic(d, vsb);
-	VSB_printf(vsb, "    }\n");
+	VSB_indent(vsb, -2);
+	VSB_printf(vsb, "}\n");
+	VSB_indent(vsb, -2);
+	VSB_printf(vsb, "}\n");
 }

bin/varnishd/cache/cache_vcl.c

@@ -86,12 +86,16 @@ VCL_Panic(struct vsb *vsb, const struct vcl *vcl)
 	AN(vsb);
 	if (vcl == NULL)
 		return;
-	VSB_printf(vsb, "  vcl = {\n");
-	VSB_printf(vsb, "    srcname = {\n");
+	VSB_printf(vsb, "vcl = {\n");
+	VSB_indent(vsb, 2);
+	VSB_printf(vsb, "srcname = {\n");
+	VSB_indent(vsb, 2);
 	for (i = 0; i < vcl->conf->nsrc; ++i)
-		VSB_printf(vsb, "      \"%s\",\n", vcl->conf->srcname[i]);
-	VSB_printf(vsb, "    },\n");
-	VSB_printf(vsb, "  },\n");
+		VSB_printf(vsb, "\"%s\",\n", vcl->conf->srcname[i]);
+	VSB_indent(vsb, -2);
+	VSB_printf(vsb, "},\n");
+	VSB_indent(vsb, -2);
+	VSB_printf(vsb, "},\n");
 }
 
 /*--------------------------------------------------------------------*/