* Added ACK scanning. This scan technique is great for testing firewall
rulesets. It can NOT find open ports, but it can distinguish between
filtered/unfilterd by sending an ACK packet to each port and waiting for
a RST to come back. Filtered ports will not send back a RST (or will
send ICMP unreachables). This scan type is activated with -sA .
* Documented the Window scan (-sW)
* "Protocol" field in output eliminated. It is now printed right
next to the number (/etc/services style). Like "22/tcp".
* Added --resume option to continue a large network scan where you left off.
It also allows you to start and stop for policy reasons
