main/nftables: add netns support
Background: openrc got patched to support running services in netns namespaces !51670 (merged)
This MR adds netns support for the nftables initd script.
Example /etc/conf.d/nftables.tenant1
:
# enable netns support
netns=tenant1
# Location of the nftables rules file to load on the service start.
rules_file="/etc/nftables.tenant1.nft"
# [..]