Combine IP{,6}T_LIB_DIR into XTABLES_LIBDIR
diff --git a/iptables-restore.c b/iptables-restore.c
index b751d2c..f556fa5 100644
--- a/iptables-restore.c
+++ b/iptables-restore.c
@@ -132,9 +132,14 @@
 	program_version = IPTABLES_VERSION;
 	line = 0;
 
-	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();