4185 New hash algorithm support

*** 22,31 ****
--- 22,32 ----
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2013 by Delphix. All rights reserved.
   * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
   * Copyright (c) 2012, Joyent, Inc. All rights reserved.
+  * Copyright 2013 Saso Kiselkov. All rights reserved.
   */
  
  /* Portions Copyright 2010 Robert Milkowski */
  
  #ifndef _SYS_DMU_H
*** 307,316 ****
--- 308,318 ----
  #define DMU_POOL_CREATION_VERSION       "creation_version"
  #define DMU_POOL_SCAN                   "scan"
  #define DMU_POOL_FREE_BPOBJ             "free_bpobj"
  #define DMU_POOL_BPTREE_OBJ             "bptree_obj"
  #define DMU_POOL_EMPTY_BPOBJ            "empty_bpobj"
+ #define DMU_POOL_CHECKSUM_SALT          "checksum_salt"
  
  /*
   * Allocate an object from this objset.  The range of object numbers
   * available is (0, DN_MAX_OBJECT).  Object 0 is the meta-dnode.
   *