addrinfo_add
if ((r = addrinfo_add(as, &sa.sa,
if ((r = addrinfo_add(as, &sa.sa, as->as.ai.hostname)))
static int addrinfo_add(struct asr_query *, const struct sockaddr *, const char *);
if (addrinfo_add(as, &u.sa, c))
if (addrinfo_add(as, &u.sa, c))