- ferm has a test suite, which passes
- ferm has multiple (generated) pieces of documentation
- it makes sense to use ferm in-place of iptables-save
This patch adds tests, packages docs, and adds an openrc init script
that I've been using for about a month now.
For well-behaved packages (`need firewall`, rather than `need iptables)
it can be an in-place replacement (as it `provide firewall`).