CLEANUP: haproxy: Free server_deinit_list in deinit()

This allocation is technically always reachable and cannot leak, but so are
a few others that *are* freed.
diff --git a/src/haproxy.c b/src/haproxy.c
index 88a1c97..5965956 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -2606,7 +2606,7 @@
 	struct build_opts_str *bol, *bolb;
 	struct post_deinit_fct *pdf, *pdfb;
 	struct proxy_deinit_fct *pxdf, *pxdfb;
-	struct server_deinit_fct *srvdf;
+	struct server_deinit_fct *srvdf, *srvdfb;
 
 	deinit_signals();
 	while (p) {
@@ -2902,6 +2902,11 @@
 		free(pdf);
 	}
 
+	list_for_each_entry_safe(srvdf, srvdfb, &server_deinit_list, list) {
+		LIST_DEL(&srvdf->list);
+		free(srvdf);
+	}
+
 	vars_prune(&global.vars, NULL, NULL);
 	pool_destroy_all();
 	deinit_pollers();