network: add data arg to set callback

src/lxc/confile.h

@@ -31,7 +31,8 @@
 struct lxc_conf;
 struct lxc_list;
 
-typedef int (*config_set_cb)(const char *, const char *, struct lxc_conf *);
+typedef int (*config_set_cb)(const char *, const char *, struct lxc_conf *,
+			     void *data);
 typedef int (*config_get_cb)(const char *, char *, int, struct lxc_conf *);
 typedef int (*config_clr_cb)(const char *key, struct lxc_conf *c);
 struct lxc_config_t {

src/lxc/lxccontainer.c

@@ -2511,7 +2511,7 @@ static bool set_config_item_locked(struct lxc_container *c, const char *key, con
 	config = lxc_getconfig(key);
 	if (!config)
 		return false;
-	if (config->set(key, v, c->lxc_conf) != 0)
+	if (config->set(key, v, c->lxc_conf, NULL) != 0)
 		return false;
 	return do_append_unexp_config_line(c->lxc_conf, key, v);
 }