5880 Increase IOV_MAX to at least 1024
Portions contributed by: Jerry Jelinek <jerry.jelinek@joyent.com>

*** 20,29 ****
--- 20,30 ----
   */
  /*
   * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   *
   * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
+  * Copyright 2015, Joyent, Inc. All rights reserved.
   */
  
  /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  /*        All Rights Reserved   */
  
*** 427,436 ****
--- 428,438 ----
  #define MSG_NOSIGNAL    0x200           /* Don't generate SIGPIPE */
  #define MSG_DUPCTRL     0x800           /* Save control message for use with */
                                          /* with left over data */
  #define MSG_XPG4_2      0x8000          /* Private: XPG4.2 flag */
  
+ /* Obsolete but kept for compilation compatability. Use IOV_MAX. */
  #define MSG_MAXIOVLEN   16
  
  #ifdef _KERNEL
  
  /*