This is a follow-up[1] patch updating the driver interface specification
replacing the low-level filter interface with a single method sync() to avoid
stale filter state if the lists are not passed through a single call.
The suggestion to keep the introspection data for the lifetime of a node
is removed too.
Some driver implementation suggestions are added with neutron, dnsmasq and
iptables in mind.
[1] I7022d10fd22e6e141e59d0596402f43d2dcde056
Change-Id: I260223b364f3550391c99bdc6214a0355fe6b565
zhulingjie