confile: allow to retrieve lxc.haltsignal

src/lxc/confile.c

@@ -3104,6 +3104,8 @@ int lxc_get_config_item(struct lxc_conf *c, const char *key, char *retv,
 		return lxc_get_limit_entry(c, retv, inlen, key + 10);
 	else if (strcmp(key, "lxc.id_map") == 0)
 		return lxc_get_idmaps(c, retv, inlen);
+	else if (strcmp(key, "lxc.haltsignal") == 0)
+		return lxc_get_conf_int(c, retv, inlen, c->haltsignal);
 	else return -1;
 
 	if (!v)