pickaxe: allow -i to search in patch case-insensitively

diff --git a/RelNotes b/RelNotes
index 8cf972cf485bbc26c479a6ac07f3005b1d188c84..5c6b14b69463249efe973dca73d81feecb352460 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.7.0.2.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.8.4.txt
\ No newline at end of file