Limit file descriptors used by packs

diff --git a/RelNotes b/RelNotes
index 0f6a588f1da39cb249a6e2ae841022245f949a40..0362cfa3799b49cd56565df62e8b030789edfdbb 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.6.3.1.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.4.1.txt
\ No newline at end of file