Sync with 2.8.4

* maint:
  Git 2.8.4

Documentation/RelNotes/2.8.4.txt

@@ -52,4 +52,18 @@ Fixes since v2.8.3
    result in a strange error message in a pathological corner case.
    This has been corrected to suggest "submodule deinit --all" instead.
 
+ * Many commands normalize command line arguments from NFD to NFC
+   variant of UTF-8 on OSX, but commands in the "diff" family did
+   not, causing "git diff $path" to complain that no such path is
+   known to Git.  They have been taught to do the normalization.
+
+ * A couple of bugs around core.autocrlf have been fixed.
+
+ * "git difftool" learned to handle unmerged paths correctly in
+   dir-diff mode.
+
+ * The "are we talking with TTY, doing an interactive session?"
+   detection has been updated to work better for "Git for Windows".
+
+
 Also contains other minor documentation updates and 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:v2.8.3/git.html[documentation for release 2.8.3]
+* link:v2.8.4/git.html[documentation for release 2.8.4]
 
 * release notes for
+  link:RelNotes/2.8.4.txt[2.8.4],
   link:RelNotes/2.8.3.txt[2.8.3],
   link:RelNotes/2.8.2.txt[2.8.2],
   link:RelNotes/2.8.1.txt[2.8.1],