receive-pack: send pack-processing stderr over sideband

diff --git a/RelNotes b/RelNotes
index 9fadb0afe4ae9bac23f80dd2b64106a171720ec9..53d76d1a47e0750b0d8b14287ff3d923ca55b438 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.7.0.1.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.12.1.txt
\ No newline at end of file