[preview] pfring: implements ips/tap mode

This is a preview of ips/tap feature for pfring.

Configuration for using pfring in IPS mode:
    pfring:
      - interface: p4p1
        threads: 1
        cluster-id: 99
        cluster-type: cluster_flow
        copy-mode: ips
        copy-iface: eth1
        flow-packet: yes
      # Second interface
      - interface: eth1
        threads: 1
        cluster-id: 99
        cluster-type: cluster_flow
        copy-mode: ips
        copy-iface: p4p1
        flow-packet: yes

Prscript:

- PR build: https://buildbot.openinfosecfoundation.org/builders/glongo/builds/15
- PR pcaps: https://buildbot.openinfosecfoundation.org/builders/glongo-pcap/builds/14