README: disambiguate what to distribute source of Indicate that if you make changes to libgit2 that you must distribute the source _to libgit2_, not the source _of your program_.
diff --git a/README.md b/README.md
index 8ea787b..5aa8ccb 100644
--- a/README.md
+++ b/README.md
@@ -244,7 +244,7 @@ License
`libgit2` is under GPL2 **with linking exception**. This means you can link to
and use the library from any program, proprietary or open source; paid or
-gratis. However, you cannot modify libgit2 and distribute it without
-supplying the source.
+gratis. However, if you modify libgit2 itself, you must distribute the
+source to your modified version of libgit2.
See the [COPYING file](COPYING) for the full license text.