short hash

Perhaps add an additional short hash for easier sharing?

https://pypi.org/project/xxhash/

```
import xxhash
...
xxhash.xxh32(b'1,28,3,6,15,35,66,150').hexdigest()
```

```
[
    {
        "DHCPFP": "1,28,3,6,15,35,66,150", 
        "DHCPFP_hash": "ba8acc3498ccc44294fe9fc47f3f7022", 
        "DHCPFP_short": "...",         
```