OS-1566 filesystem limits for ZFS datasets

*** 216,226 ****
      uint64_t flags, dmu_tx_t *tx);
  int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
  dsl_checkfunc_t dsl_dataset_destroy_check;
  dsl_syncfunc_t dsl_dataset_destroy_sync;
  dsl_syncfunc_t dsl_dataset_user_hold_sync;
! int dsl_dataset_snapshot_check(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
  void dsl_dataset_snapshot_sync(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
  int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
  int dsl_dataset_promote(const char *name, char *conflsnap);
  int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
      boolean_t force);
--- 216,227 ----
      uint64_t flags, dmu_tx_t *tx);
  int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
  dsl_checkfunc_t dsl_dataset_destroy_check;
  dsl_syncfunc_t dsl_dataset_destroy_sync;
  dsl_syncfunc_t dsl_dataset_user_hold_sync;
! int dsl_dataset_snapshot_check(dsl_dataset_t *ds, const char *, uint64_t,
!     dmu_tx_t *tx);
  void dsl_dataset_snapshot_sync(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
  int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
  int dsl_dataset_promote(const char *name, char *conflsnap);
  int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
      boolean_t force);