Combine IP{,6}T_LIB_DIR into XTABLES_LIBDIR
diff --git a/iptables-save.c b/iptables-save.c
index c0c37ed..1ce2090 100644
--- a/iptables-save.c
+++ b/iptables-save.c
@@ -357,9 +357,14 @@
 	program_name = "iptables-save";
 	program_version = IPTABLES_VERSION;
 
-	lib_dir = getenv("IPTABLES_LIB_DIR");
-	if (!lib_dir)
-		lib_dir = IPT_LIB_DIR;
+	lib_dir = getenv("XTABLES_LIBDIR");
+	if (lib_dir == NULL) {
+		lib_dir = getenv("IPTABLES_LIB_DIR");
+		if (lib_dir != NULL)
+			fprintf(stderr, "IPTABLES_LIB_DIR is deprecated\n");
+	}
+	if (lib_dir == NULL)
+		lib_dir = XTABLES_LIBDIR;
 
 #ifdef NO_SHARED_LIBS
 	init_extensions();