6536 zfs send: want a way to disable sending of free records
Reviewed by: Alexander Stetsenko <astetsenko@racktopsystems.com>
Reviewed by: Kim Shrier <kshrier@racktopsystems.com>

*** 23,32 ****
--- 23,33 ----
   * Use is subject to license terms.
   */
  /*
   * Copyright (c) 2012, Joyent, Inc. All rights reserved.
   * Copyright (c) 2013, 2015 by Delphix. All rights reserved.
+  * Copyright 2015 RackTop Systems.
   */
  
  #ifndef _SYS_DMU_IMPL_H
  #define _SYS_DMU_IMPL_H
  
*** 296,305 ****
--- 297,307 ----
          uint64_t dsa_featureflags;
          uint64_t dsa_last_data_object;
          uint64_t dsa_last_data_offset;
          uint64_t dsa_resume_object;
          uint64_t dsa_resume_offset;
+         boolean_t dsa_skip_free;
  } dmu_sendarg_t;
  
  void dmu_object_zapify(objset_t *, uint64_t, dmu_object_type_t, dmu_tx_t *);
  void dmu_object_free_zapified(objset_t *, uint64_t, dmu_tx_t *);
  int dmu_buf_hold_noread(objset_t *, uint64_t, uint64_t,