userspace-rcu 0.8.1

Signed-off-by: Ondřej Surý <ondrej@sury.org>
Knot DNS 1.4.3

Signed-off-by: Ondřej Surý <ondrej@sury.org>
cleanup userspace-rcu and knot formulas
userspace-rcu: Compile examples in the brew test target
* Add test target that tests kdig & khost and checks config with knotc checkconf * Add default configuration file with IPv4 and IPv6 and no zones * Add plist to allow to run knotd under launchd
userspace-rcu: add 0.8.1 bottle.
backupninja: add 1.0.1 bottle.
knot: add 1.4.3 bottle.