Automatic configuration for syslog forwarding

[secynic]

Add argument during nfsinkhole-setup.py --install to set syslog forwarding (destination, protocol). Also add argument for which logs to send (/var/log/nfsinkhole-*.log -- 4 different files).

If your tcpdump doesn't support packet printing (< v4.5), nfsinkhole-pcap.log won't exist, and you won't be able to send the nfsinkhole.pcap file via syslog.