/* Prepares a fake header with a single response. Advances header_blob */
static ssize_t rwrap_fake_header(uint8_t **header_blob, size_t remaining,
size_t ancount, size_t arcount)
/* Prepares a fake header with a single response. Advances header_blob */
static ssize_t rwrap_fake_header(uint8_t **header_blob, size_t remaining,
size_t ancount, size_t arcount)