[PATCH] Update git-clone documentation

The documentation for git-clone is behind the actual command.
I have been getting tired of reading the shell script to see
what the arguments are so here is an update of the actual documentation.
Signed-off-by: NEric Biederman <ebiederman@xmission.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Documentation/git-clone.txt

@@ -9,7 +9,7 @@ git-clone - Clones a repository.
 
 SYNOPSIS
 --------
-'git clone' [-l] [-u <upload-pack>] [-q] <repository> <directory>
+'git clone' [-l [-s]] [-q] [-n] [-u <upload-pack>] <repository> <directory>
 
 DESCRIPTION
 -----------
@@ -17,6 +17,7 @@ Clones a repository into a newly created directory.
 
 OPTIONS
 -------
+--local::
 -l::
 	When the repository to clone from is on a local machine,
 	this flag bypasses normal "git aware" transport
@@ -25,10 +26,22 @@ OPTIONS
 	The files under .git/objects/ directory are hardlinked
 	to save space when possible.
 
+--shared::
+-s::
+	When the repository to clone is on the local machine,
+	instead of using hard links automatically setup
+	.git/objects/info/alternatives to share the objects
+	with the source repository
+
+--quiet::
 -q::
 	Operate quietly.  This flag is passed to "rsync" and
 	"git-clone-pack" commands when given.
 
+-n::
+	No checkout of HEAD is performed after the clone is complete.
+
+--upload-pack <upload-pack>::
 -u <upload-pack>::
 	When given, and the repository to clone from is handled
 	by 'git-clone-pack', '--exec=<upload-pack>' is passed to