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

*** 21,30 ****
--- 21,31 ----
  
  /*
   * Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright 2016 Nexenta Systems, Inc.  All rights reserved.
   * Copyright 2019 OmniOS Community Edition (OmniOSce) Association.
+  * Copyright 2015, Joyent, Inc. All rights reserved.
   */
  
  #include <sys/types.h>
  #include <sys/t_lock.h>
  #include <sys/param.h>
*** 1885,1895 ****
  
  ssize_t
  soreadfile(file_t *fp, uchar_t *buf, u_offset_t fileoff, int *err, size_t size)
  {
          struct uio auio;
!         struct iovec aiov[MSG_MAXIOVLEN];
          register vnode_t *vp;
          int ioflag, rwflag;
          ssize_t cnt;
          int error = 0;
          int iovcnt = 0;
--- 1886,1896 ----
  
  ssize_t
  soreadfile(file_t *fp, uchar_t *buf, u_offset_t fileoff, int *err, size_t size)
  {
          struct uio auio;
!         struct iovec aiov[1];
          register vnode_t *vp;
          int ioflag, rwflag;
          ssize_t cnt;
          int error = 0;
          int iovcnt = 0;