add begin/end thread macros, linux SLL datalink type, crank version
add begin/end thread macros, linux SLL datalink type, crank version

itxx00/pypcap,afghanistanyn/pypcap,itxx00/pypcap,pombreda/pypcap,fasguard/fasguard-pcap,afghanistanyn/pypcap,FunctionAnalysis/pypcap,FunctionAnalysis/pypcap,est/pypcap,pombreda/pypcap,est/pypcap,fasguard/fasguard-pcap