user/iptables: new package
APKBUILD adapted from Alpine. There's optional functionality available here which requires libraries which we don't have packaged (libmnl and libnetfilter_conntrack), however Alpine does not appear to have this enabled.
sed replacement in the Alpine package's
prepare() which I've removed, which hasn't caused any issues in my testing, though I'm not sure how to verify if the
sed replacements against the
libtool script are still necessary. I've checked the script before and after running the
seds, and it's definitely modifying the file, but I'm not sure if it's needed.
This has only been built on
aarch64, with only a few
iptables -L commands to verify that there aren't any obvious problems. Testing on other arches would be advised to further ensure that this package indeed works correctly.