Do not emit extra l4proto filter for helpers

[brada4]

Do not emit unnecessary l4proto filter for helpers. No bytecode or readback changed.
There is something better waiting on top of this cleanup

Signed-off-by: Andris PE [email protected]

[brada4]

@jow- please treat this quicker than usual

nft -c -d netlink -f - << EOF
table inet testing {
 chain old {
  meta l4proto tcp tcp dport 45
 }
 chain intent {
  meta l4proto tcp meta l4proto tcp th dport 45
 }
 chain new {
  tcp dport 45
 }
}
EOF

Evil intent of original is luckily squashed by nft cli.

[brada4]

btw 3x if rule.helper sections are never accessed.