Updated ZFS Feature Support & Wishlist (markdown)

ZFS-Feature-Support-&-Wishlist.md

@@ -16,3 +16,13 @@ Syntax:
 * ability to ignore all properties from a snapshot stream
 * => zrepl still needs property management, however it will sync them itself
 * Support: none | `-x` but not all | ? | ?
+
+## `zfs allow -u zrepl destroy_snaps_created_by=zrepl zroot`
+
+* for unprivileged zrepl daemon: want zrepl user to just destroy snaps it created
+* apparently, the `allow -d` flag does this for filesystems created after allow, but not for snaps
+* so the feature should essentially be:
+    * separate permission for destroy_snapshot, so we have `create|destroy`, `snapshot|destroy_snap`
+    * then use `zfs allow -d` to limit zrepl daemon to just destroy those snaps it created
+
+