xap_helper: relicense C++ implementation to GPL-2.0+

This will allow us to incorporate approxidate time/date parsing
from git.git without needing to relicense git code.

diff --git a/lib/PublicInbox/xap_helper.h b/lib/PublicInbox/xap_helper.h
index 7210c94055dfd23d871e423f1ac2c8552916da38..a2fea26620c85360266946bf937bd8905a01d4d6 100644 (file)
--- a/lib/PublicInbox/xap_helper.h
+++ b/lib/PublicInbox/xap_helper.h
@@ -1,6 +1,7 @@
 /*
  * Copyright (C) all contributors <meta@public-inbox.org>
- * License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+ * License: GPL-2.0+ <https://www.gnu.org/licenses/gpl-2.0.txt>
+ * Note: GPL-2+ since it'll incorporate approxidate from git someday
  *
  * Standalone helper process using C and minimal C++ for Xapian,
  * this is not linked to Perl in any way.