add loopback support
add loopback support

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