minor change

git-svn-id: https://svn.ntop.org/svn/ntop/trunk/PF_RING@7131 a02cd0c1-8e76-42e1-a119-56f9641475e2
returning 0 on pfring_set_poll_duration success

git-svn-id: https://svn.ntop.org/svn/ntop/trunk/PF_RING@7147 a02cd0c1-8e76-42e1-a119-56f9641475e2
PF_RING-aware igb (5.1.2) and ixgbe (3.19.1) drivers update (courtesy of Pablo Nebrera <pablonebrera@eneotecnologia.com>)


git-svn-id: https://svn.ntop.org/svn/ntop/trunk/PF_RING@7150 a02cd0c1-8e76-42e1-a119-56f9641475e2
stats fix on close

git-svn-id: https://svn.ntop.org/svn/ntop/trunk/PF_RING@7151 a02cd0c1-8e76-42e1-a119-56f9641475e2
default moved to latest versions

git-svn-id: https://svn.ntop.org/svn/ntop/trunk/PF_RING@7160 a02cd0c1-8e76-42e1-a119-56f9641475e2
64bit lib update: app stats fix for libzero dna cluster slave


git-svn-id: https://svn.ntop.org/svn/ntop/trunk/PF_RING@7161 a02cd0c1-8e76-42e1-a119-56f9641475e2