ncurses: DHCP Release IP reverse order

[soxrok2212]

The ncurses UI asks for the server IP and a start/end IP. These are processed backwards upon pcap inspection. Example:

Server IP: 10.0.0.1 -> 1.0.0.10
Start IP: 10.0.0.2 -> 2.0.0.10
End IP: 10.0.0.254 -> 254.0.0.10

[soxrok2212]

Partial duplicate of https://github.com/tomac/yersinia/issues/59