Add nftables support

[galal-hussein]

Signed-off-by: galal-hussein hussein.galal.ahmed.11@gmail.com

• Stop using legacy iptables for svclb pods k3s#6649
• [BUG] svclb-traefik* won't start after host crash and restart. #34

[brandond]

I would probably set bin_dir at the top of the file instead of right before calling the functions, just for readability's sake.

Also, one of the set functions still uses the wrong variable.

[galal-hussein]

I would probably set bin_dir at the top of the file instead of right before calling the functions, just for readability's sake.

Also, one of the set functions still uses the wrong variable.

yeah sorry the file was saved incorrectly, I fixed it now