diff --stat: add config option to limit graph width

diff --git a/RelNotes b/RelNotes
index 3d420845b117b3f3eb82d1f0948a61c7989d8af9..d69b2c37acc38f4916d4daa8387abb567a8b9834 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.6.1.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.9.1.txt
\ No newline at end of file