Fix build on 11.0 and later due to missing libpcap header file
I find it weird to include header files like that, newer version of libcap does not provide pcap-int.h, it is probably because it has been replaced by something, there might be a better approach to address this, I'll think about it and come back to you
Turns out there was a much simpler solution for this build failure. By simply removing reference to "pcap-int.h" (which was not used at all) now this port builds on 10.x, 11.x and 12x just fine.
Unbreak on 11.x+ by removing reference to unused header file.
Also fixed an issue with creating RAW sockets which caused failure when tracing TCP/UDP (reported by Andrew Wu <email@example.com>)