hostent_add_alias
if (hostent_add_alias(h, tokens[i], 0) == -1)
if (hostent_add_alias(h, rr.rr_dname, 1) == -1)
hostent_add_alias(h, rr.rr.ptr.ptrname, 1);
static int hostent_add_alias(struct hostent_ext *, const char *, int);