Do a call to the server. This really
clones a Protocols.LysKOM.Request object,
and initialises it. XXX is to be read as
one of the calls in the lyskom protocol. ('-' is replaced
with '_'.) (ie, logout, async_login or async_cb_get_conf_stat.)
The first method is a synchronous call. This will
send the command, wait for the server to execute it,
and then return the result.
The last two are asynchronous calls, returning an
initialised Protocols.LysKOM.Request object.