Reported by Kullawat Chaowanawatee, Feb 29, 2012

just add this to main() of Plugin/SyncGit/Serve.php
to provide a welcome message via SSH.
----

$sql = new Pluf_SQL('login=%s', array($username));
$users = 
Pluf::factory('Pluf_User')->getList(array('filter'=>$sql->ge
n()));

if ($users->count() != 1 or !$users[0]->active)
    $user = "";
else
    $user = $users[0];

/* Fatal Error here in order to don't provide a SSH shell */
if ($user != "")
    self::fatalError('Hi ' . $user . "!\nYou've successfully 
authenticated, but we do not provide shell access.");
else
    self::fatalError('Hi! Who are you?');