libpcap-1.4.0
Added support for Win32, based on WinPcap.
Added a bunch of #ifdef directives to make wpcap.dll (WinPcap) compile under cygwin. cygwin finally ships with ws2tcpip.h, so we need to get rid of some duplicated definitions.
Don't define or use any of the SIZEOF_ values.
Modified the license at the beginning of the files created by the Politecno di Torino developers from the 4-clause BSD code to the modified BSD license