acl: Fix reading acl_globals_only setting

It was being read in wrong place, so it may not have been read at all.

src/plugins/acl/acl-backend.c

@@ -61,6 +61,8 @@ acl_backend_init(const char *data, struct mailbox_list *list,
 	backend->list = list;
 	backend->username = p_strdup(backend->pool, acl_username);
 	backend->owner = owner;
+	backend->globals_only =
+		mail_user_plugin_getenv_bool(user, "acl_globals_only");
 
 	if (group_count > 0) {
 		backend->group_count = group_count;
@@ -175,8 +177,6 @@ struct acl_object *acl_backend_get_default_object(struct acl_backend *backend)
 		    ns->type == MAIL_NAMESPACE_TYPE_SHARED)
 			default_name = "INBOX";
 	}
-	backend->globals_only =
-		mail_user_plugin_getenv_bool(user, "acl_globals_only");
 	backend->default_aclobj =
 		acl_object_init_from_name(backend, default_name);
 	return backend->default_aclobj;