st_hash
indx = st_hash(oname, *onamelen, N_TAB_SZ);
static u_int st_hash(const char *, int, int);
indx = st_hash(arcn->name, namelen, F_TAB_SZ);
indx = st_hash(oname, onamelen, N_TAB_SZ);
pptr = usrtb + st_hash(name, namelen, UNM_SZ);
pptr = grptb + st_hash(name, namelen, GID_SZ);