sync_update
int sync_update(int, struct ship *, const char *, long, long, long, long);
(void) sync_update(type, ship, NULL, a, b, c, d);
(void) sync_update(type, ship, a, 0, 0, 0, 0);
if (sync_update(type, SHIP(shipnum), astr, a, b, c, d) < 0)
sync_update(now, helo, ip, from, to);
extern void sync_update(time_t, char *, char *, char *, char *);