openwrt 22.03 RC4下依赖包kmod-ipt-nat未默认安装，fw4有兼容性问题

[q741451]

openwrt 22.03 RC4下依赖包kmod-ipt-nat未默认安装，导致nat策略报错跑不起来：
~# /etc/init.d/shadowsocks start
iptables-restore v1.8.7 (legacy): iptables-restore: unable to initialize table 'nat'

fw4有兼容性问题：
~# /etc/init.d/firewall restart
Section shadowsocks option 'family' is not supported by fw4
Section shadowsocks option 'reload' is not supported by fw4

[mcsmartie]

Tested Openwrt 22.03.01 and 22.03.02, and snapshots as of yesterday. Shadowsocks runs, but not routing traffic.

[ned42]

Tested Openwrt 22.03.01 and 22.03.02, and snapshots as of yesterday. Shadowsocks runs, but not routing traffic.

says the cause of 'nat' or what
traffic start routing after installed kmod-ipt-nat & iptables-mod-nat-extra in my case