👌 IMPROVE: add SSH port as possible parameter

Signed-off-by: Jonas Sulzer <jonas@violoncello.ch>

README.md

@@ -156,14 +156,14 @@ SSH
 Authenticates users via SSH. You can use any SSH2 server, but it must accept password authentication.
 
 ### Configuration
-The only supported parameter is the hostname of the remote machine.
+The supported parameters are the hostname and the port (default `22`) of the remote machine.
 
 Add the following to your `config.php`:
 
     'user_backends' => array(
         array(
             'class' => 'OC_User_SSH',
-            'arguments' => array('127.0.0.1'),
+            'arguments' => array('127.0.0.1', '22'),
         ),
     ),