HTTP_SessionServer protocol
---------------------------
$Id: protocol.txt,v 1.1 2004/10/28 17:06:50 schst Exp $

Supported commands:

string  new                                : create and open a new session
void    open string $sid string $mode      : open existing session
void    close                              : close session
void    destroy                            : destroy current session
array   keys                               : get all keys in the session

void    put string $key mixed $val         : store a value
mixed   get string $key                    : retrieve a value
void    remove string $key                 : delete a value
bool    exists string $key                 : check, whether value exists
string  regenerate_id                      : create a new session id
void    commit                             : commit the session (change to readonly mode)