2619 asynchronous destruction of ZFS file systems
2747 SPA versioning with zfs feature flags
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

*** 57,66 ****
--- 57,67 ----
          libzfs_fru_notself;
          libzfs_fru_refresh;
          libzfs_init;
          libzfs_mnttab_cache;
          libzfs_print_on_error;
+         spa_feature_table;
          zfs_allocatable_devs;
          zfs_asprintf;
          zfs_clone;
          zfs_close;
          zfs_create;
*** 199,212 ****
--- 200,217 ----
          zpool_mount_datasets;
          zpool_name_to_prop;
          zpool_obj_to_path;
          zpool_open;
          zpool_open_canfail;
+         zpool_print_unsup_feat;
          zpool_prop_align_right;
          zpool_prop_column_name;
+         zpool_prop_feature;
+         zpool_prop_get_feature;
          zpool_prop_readonly;
          zpool_prop_to_name;
+         zpool_prop_unsupported;
          zpool_prop_values;
          zpool_read_label;
          zpool_refresh_stats;
          zpool_reguid;
          zpool_reopen;