login-common: Include local_name in login_var_expand_table

This way it can be used in login_log_format

src/login-common/client-common.c

@@ -507,6 +507,7 @@ static struct var_expand_table login_var_expand_empty_tab[] = {
 	{ '\0', NULL, "auth_username" },
 	{ '\0', NULL, "auth_domain" },
 	{ '\0', NULL, "listener" },
+	{ '\0', NULL, "local_name" },
 	{ '\0', NULL, NULL }
 };
 
@@ -581,6 +582,7 @@ get_var_expand_table(struct client *client)
 		tab[24].value = tab[21].value;
 	}
 	tab[25].value = client->listener_name;
+	tab[26].value = str_sanitize(client->local_name, 256);
 	return tab;
 }