README.org: Clarify `free software' with a link to the FSF.

diff --git a/README.org b/README.org
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--- a/README.org
+++ b/README.org
@@ -25,7 +25,8 @@ configuration file.  Of course, there's a benefit to having a collection
 of high-quality configuration runes curated centrally, so I'm happy to
 accept submissions in support of any free[fn:free] Lisp implementations.
 
-[fn:free] Here I mean free as in freedom.
+[fn:free] Here I mean `free' as in freedom: see
+https://www.fsf.org/about/what-is-free-software.
 
 
 * Writing scripts in Common Lisp

diff --git a/doc/README.pdf b/doc/README.pdf
index cb0e1b3..38f74ff 100644 (file)
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