[jnc_io_pcap] added env setting JNC_IO_PCAP_DISABLE_NPCAP for disabling npcap
[jnc_io_pcap] added env setting JNC_IO_PCAP_DISABLE_NPCAP for disabling npcap

vovkos/jancy,vovkos/jancy,vovkos/jancy,vovkos/jancy,vovkos/jancy