New port: net/hping3

hping3 is a command-line oriented TCP/IP packet assembler/analyzer.

This port is significantly modified version of already existing
older port net/hping but hping3 has more useful features like
IP options LSRR/SSRR etc.

net/hping3 does not conflict with net/hping due to different names
of installed files and both utilities may be installed same time.