hash: use native appropriately sized hash for word, not native host word size
hash: use native appropriately sized hash for word, not native host word size

These shouldn't be used over the wire or on disk, but just in case.

Also, i suspect the 64-bit hash is probably faster than the 32bit one
twice?

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph