maint: Document how to handle assignment exemption

* HACKING: Update.

diff --git a/HACKING b/HACKING
index e34870b849fa3d5c8c912a7340dcd90de354de4c..3a0b22cca8fa72f8a34962f2b0b072b7e43a2460 100644 (file)
--- a/HACKING
+++ b/HACKING
@@ -274,6 +274,12 @@
       ... removed in commit 'v1.11-1674-g02e9072' of 01-01-2012,
       "dist: ditch support for lzma"...
 
+* If the commit is a tiny change that is exempt from copyright paperwork, the
+  commit message should contain a separate line after the detailed list of
+  touched files like the following:
+
+      Copyright-paperwork-exempt: yes
+
 ============================================================================
 = Test suite