copyright: Be clear that SPDX indications are licence grants

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/debian/copyright b/debian/copyright
index faafafaaa1dbd273727abcb280fd81078309fe0f..bb2b76242c7795a9540b1701b462a63ce3b9dc7d 100644 (file)
--- a/debian/copyright
+++ b/debian/copyright
@@ -116,3 +116,9 @@ with the chiark-utils source package as the file COPYING; if not,
 email me at one of the addresses above or consult the Free Software
 Foundation's website at www.fsf.org, or the GNU Project website at
 www.gnu.org.
+
+
+Some of the source files use the SPDX licence indication convention.
+For example, you may see:
+  SPDX-License-Identifier: GPL-3.0-or-later
+This should be read as a licence grant, as is conventional.