Update draft release notes to 1.7.9.1

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/RelNotes/1.7.9.1.txt

@@ -4,9 +4,17 @@ Git v1.7.9.1 Release Notes
 Fixes since v1.7.9
 ------------------
 
+ * rpmbuild noticed an unpackaged but installed *.mo file and failed.
+
  * Subprocesses spawned from various git programs were often left running
    to completion even when the top-level process was killed.
 
+ * "git add -e" learned not to show a diff for an otherwise unmodified
+   submodule that only has uncommitted local changes in the patch
+   prepared by for the user to edit.
+
+ * Typo in "git branch --edit-description my-tpoic" was not diagnosed.
+
  * Using "git grep -l/-L" together with options -W or --break may not
    make much sense as the output is to only count the number of hits
    and there is no place for file breaks, but the latter options made
@@ -16,14 +24,22 @@ Fixes since v1.7.9
    chain and veered into side branch from which the whole change to the
    specified paths came.
 
+ * "git merge --ff-only $tag" failed because it cannot record the
+   required mergetag without creating a merge, but this is so common
+   operation for branch that is used _only_ to follow the upstream, so
+   it was changed to allow fast-forwarding without recording the mergetag.
+
+ * "git mergetool" now gives an empty file as the common base version
+   to the backend when dealing with the "both sides added, differently"
+   case.
+
  * "git push -q" was not sufficiently quiet.
 
  * When "git push" fails to update any refs, the client side did not
    report an error correctly to the end user.
 
- * "git mergetool" now gives an empty file as the common base version
-   to the backend when dealing with the "both sides added, differently"
-   case.
+ * "rebase" and "commit --amend" failed to work on commits with ancient
+   timestamps near year 1970.
 
  * When asking for a tag to be pulled, "request-pull" did not show the
    name of the tag prefixed with "tags/", which would have helped older