pcap of  spa with Ethernet FCS

Captured with:
tcpdump -i eth0 -l -nn -s 0 -w fcs_spa.pcap udp port 62201

Generated remotely with:
LD_LIBRARY_PATH=./lib/.libs ./client/.libs/fwknop -A tcp/22 -a 127.0.0.2
-D 192.168.18.11 --no-save-args --verbose --verbose --rc-file
./test/conf/fwknoprc_default_hmac_base64_key
Merge branch 'beaglebone_libpcap_workaround' of https://github.com/stubbsw/fwknop into stubbsw-beaglebone_libpcap_workaround
added Ethernet FCS header test with pcap contributed by Bill Stubs
minor code restructure for Ethernet FCS header processing
ChangeLog update for FCS bug fix