[PATCH] add instructions on how to send patches to the mailing list with Gmail

["Tom Preston-Werner" <tom@github.com>]

Gmail is one of the most popular email providers in the world. Now that Gmail
supports IMAP, sending properly formatted patches via `git imap-send` is
trivial. This section in SubmittingPatches explains how to do so.

Signed-off-by: Tom Preston-Werner <tom@github.com>
---
 Documentation/SubmittingPatches |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index a1e9100..f0295c6 100644
--- a/Documentation/SubmittingPatches
+++ b/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!
-- 
1.6.0.2