The option "-zombie-ttl N" does not work as expected about sexpect

[clarkwang]

The issue is in here:

 907         /* -zombie-ttl */
 908         if (spawn->zombie_ttl >= 0 && g.SIGCHLDed && g.fd_ptm < 0 && g.conn.sock < 0) {
 909             if (Clock_diff( & spawn->startime, NULL) > spawn->zombie_ttl) {
 910                 debug("the zombie's been alive for %d seconds. killing it now.",
 911                       spawn->zombie_ttl);
 912                 break;
 913             }
 914         }

It really should not compare with spawn->startime. The semantic is also not quite correct if we compare with spawn->exittime. What we want is actually zombie idle time.

[clarkwang]

Will rename -zombie-ttl | -zttl to -zombie-idle | -z-idle.