ldisc_send(NULL, 0);
ldisc_send(NULL, 0, 0);
static void option_side_effects(struct Opt *o, int enabled){    if (o->option == TELOPT_ECHO && o->send == DO)	echoing = !enabled;    else if (o->option == TELOPT_SGA && o->send == DO)	editing = !enabled;    ldisc_send(NULL, 0);	       /* cause ldisc to notice the change */    /* Ensure we get the minimum options */    if (!activated) {	if (o_echo.state == INACTIVE) {	    o_echo.state = REQUESTED;	    send_opt(o_echo.send, o_echo.option);	}	if (o_we_sga.state == INACTIVE) {	    o_we_sga.state = REQUESTED;	    send_opt(o_we_sga.send, o_we_sga.option);	}	if (o_they_sga.state == INACTIVE) {	    o_they_sga.state = REQUESTED;	    send_opt(o_they_sga.send, o_they_sga.option);	}	activated = TRUE;    }}