6536 zfs send: want a way to disable setting of DRR_FLAG_FREERECORDS
Reviewed by: Anil Vijarnia <avijarnia@racktopsystems.com>
Reviewed by: Kim Shrier <kshrier@racktopsystems.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

*** 19,28 ****
--- 19,29 ----
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
+  * Copyright 2016 RackTop Systems.
   */
  
  #ifndef _SYS_ZFS_IOCTL_H
  #define _SYS_ZFS_IOCTL_H
  
*** 122,131 ****
--- 123,136 ----
   * of the features indicated by feature flags.
   */
  
  #define DMU_BACKUP_MAGIC 0x2F5bacbacULL
  
+ /*
+  * Send stream flags.  Bits 24-31 are reserved for vendor-specific
+  * implementations and should not be used.
+  */
  #define DRR_FLAG_CLONE          (1<<0)
  #define DRR_FLAG_CI_DATA        (1<<1)
  /*
   * This send stream, if it is a full send, includes the FREE and FREEOBJECT
   * records that are created by the sending process.  This means that the send