Merge branch 'maint'

* maint:
  Start 1.6.0.4 cycle
  add instructions on how to send patches to the mailing list with Gmail
  Documentation/gitattributes: Add subsection header for each attribute
  git send-email: avoid leaking directory file descriptors.
  send-pack: do not send out single-level refs such as refs/stash
  fix overlapping memcpy in normalize_absolute_path
  pack-objects: avoid reading uninitalized data
  correct cache_entry allocation

Conflicts:
	RelNotes

Documentation/SubmittingPatches

@@ -456,3 +456,30 @@ This should help you to submit patches inline using KMail.
 
 5) Back in the compose window: add whatever other text you wish to the
 message, complete the addressing and subject fields, and press send.
+
+
+Gmail
+-----
+
+Submitting properly formatted patches via Gmail is simple now that
+IMAP support is available. First, edit your ~/.gitconfig to specify your
+account settings:
+
+[imap]
+	folder = "[Gmail]/Drafts"
+	host = imaps://imap.gmail.com
+	user = user@gmail.com
+	pass = p4ssw0rd
+	port = 993
+	sslverify = false
+
+Next, ensure that your Gmail settings are correct. In "Settings" the
+"Use Unicode (UTF-8) encoding for outgoing messages" should be checked.
+
+Once your commits are ready to send to the mailing list, run the following
+command to send the patch emails to your Gmail Drafts folder.
+
+	$ git format-patch -M --stdout origin/master | git imap-send
+
+Go to your Gmail account, open the Drafts folder, find the patch email, fill
+in the To: and CC: fields and send away!