Sync with maint

Documentation/RelNotes/2.3.6.txt

+Git v2.3.6 Release Notes
+========================
+
+Fixes since v2.3.5
+------------------
+
+ * "diff-highlight" (in contrib/) used to show byte-by-byte
+   differences, which meant that multi-byte characters can be chopped
+   in the middle.  It learned to pay attention to character boundaries
+   (assuming the UTF-8 payload).
+
+Also contains typofixes, documentation updates and trivial code
+clean-ups.

Documentation/git.txt

@@ -43,9 +43,10 @@ unreleased) version of Git, that is available from the 'master'
 branch of the `git.git` repository.
 Documentation for older releases are available here:
 
-* link:v2.3.5/git.html[documentation for release 2.3.5]
+* link:v2.3.6/git.html[documentation for release 2.3.6]
 
 * release notes for
+  link:RelNotes/2.3.6.txt[2.3.6],
   link:RelNotes/2.3.5.txt[2.3.5],
   link:RelNotes/2.3.4.txt[2.3.4],
   link:RelNotes/2.3.3.txt[2.3.3],