def __init__ (self, server, *largs, **kwargs):
super(SFTPServerInterface, self).__init__(*largs, **kwargs)<EOL>
Create a new SFTPServerInterface object.  This method does nothing by
default and is meant to be overridden by subclasses.

@param server: the server object associated with this channel and
    SFTP subsystem
@type server: L{ServerInterface}