Add script to reserve special IP's in public address range.

Change-Id: I555f1e8efc543218668ba3802908190b9dddbfa0
Signed-off-by: Rosario Di Somma <rosario.disomma@dreamhost.com>
Merge pull request #1 from rodis/feature/add-reserved-ips-script

Add script to reserve special IP's in public address range.