cleanstrcpy
(void) cleanstrcpy(hostbuf, hp->h_name, size);
(void) cleanstrcpy(hostbuf, *ha, size - 1);
cleanstrcpy(&hbuf[6], p, MAXAUTHINFO);
cleanstrcpy(hbuf, p, MAXAUTHINFO);
cleanstrcpy(ep, p, i);
cleanstrcpy(ep, optarg, i);
cleanstrcpy(p, p, strlen(p) + 1);
extern void cleanstrcpy __P((char *, char *, int));