doc: HACKING: reference http://www.gnu.org/licenses/why-assign.html

Suggestion from Patrick Schoenfeld.

diff --git a/HACKING b/HACKING
index b835652..6eb0480 100644 (file)
--- a/HACKING
+++ b/HACKING
@@ -323,6 +323,10 @@ you'd use doc/Copyright/request-assign.future:
 
 You may make assignments for up to four projects at a time.
 
+In case you're wondering why we bother with all of this, read this:
+
+    http://www.gnu.org/licenses/why-assign.html
+
 
 Run "make syntax-check", or even "make distcheck"
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