ub_resolve_async
int ub_resolve_async(struct ub_ctx* ctx, const char* name, int rrtype,
int ub_resolve_async(struct ub_ctx* ctx, const char* name, int rrtype,
r = ub_resolve_async(inf->ctx,
r = ub_resolve_async(inf->ctx,
r = ub_resolve_async(ctx, argv[i], LDNS_RR_TYPE_A,