OS-1566 filesystem limits for ZFS datasets

*** 19,28 ****
--- 19,29 ----
   * CDDL HEADER END
   */
  
  /*
   * Copyright (c) 2012 by Delphix. All rights reserved.
+  * Copyright (c) 2012 Joyent, Inc. All rights reserved.
   */
  
  #ifndef _ZFEATURE_COMMON_H
  #define _ZFEATURE_COMMON_H
  
*** 50,59 ****
--- 51,61 ----
  #define ZFS_FEATURE_DEBUG
  
  enum spa_feature {
          SPA_FEATURE_ASYNC_DESTROY,
          SPA_FEATURE_EMPTY_BPOBJ,
+         SPA_FEATURE_FS_SS_LIMIT,
          SPA_FEATURES
  } spa_feature_t;
  
  extern zfeature_info_t spa_feature_table[SPA_FEATURES];