FITS: generating send-streams in portable format
This commit adds the command 'zfs fits-send', analogous to zfs send. The
generated send stream is compatible with the stream generated with that
from 'btrfs send' and can in principle easily be received to any filesystem.

*** 200,209 ****
--- 200,210 ----
  int dsl_dataset_own(const char *name, boolean_t inconsistentok,
      void *tag, dsl_dataset_t **dsp);
  int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
      boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp);
  void dsl_dataset_name(dsl_dataset_t *ds, char *name);
+ int dsl_dataset_namelen(dsl_dataset_t *ds);
  void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
  void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
  void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag);
  boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok,
      void *tag);