Add firewall address-sets: named sets of IP addresses and networks,
usable as zone sources for per-IP access control, issue #1189. Static
entries are part of the configuration; dynamic entries are managed at
runtime with new add/remove/flush actions, from the CLI or over
NETCONF/RESTCONF. Dynamic entries survive firewall configuration
changes but are not saved to the configuration. Sets with a timeout
expire their entries automatically.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
