doc/COPYING: add one to state the "or later" bit

diff --git a/doc/COPYING b/doc/COPYING
new file mode 100644 (file)
index 0000000..73433a7
--- /dev/null
+++ b/doc/COPYING
@@ -0,0 +1,15 @@
+mailshears: prune your mail garden
+Copyright (C) 2024  Michael Orlitzky
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.