evConsIovec
*iovp++ = evConsIovec(tran->outbuf.text, tran->outbuf.used);
*iovp++ = evConsIovec(tmp, 2);
*iovp++ = evConsIovec(sess->outbuf.text, sess->outbuf.used);
*iovp++ = evConsIovec(tmp, bodylen);
*iovp++ = evConsIovec(tmp, 3);
iov[0] = evConsIovec(&len, INT16SZ);
iov[1] = evConsIovec(tmp, buflen);
struct iovec evConsIovec __P((void *, size_t));