rpc server: fix host filter for localhost on ipv6

[niklasad1]

This PR fixes an issue that I discovered using connecting to the RPC via localhost using cURL, where cURL tries to connect to via ipv6 before ipv4 when querying localhost which messed up the http host filter whereas it would connect to the address [::1]::9944 host_header: localhost:9944 but the ipv6 interface only whitelisted [::1]:9944 which this fixes.

So let's whitelist all localhost interfaces to avoid such weird edge-cases.

Behavior before this PR

$ polkadot --chain westend-dev &
$ curl -v \
     -H 'Content-Type: application/json' \
     -d '{"jsonrpc":"2.0","id":"id","method":"system_name"}' \
     http://localhost:9944
* Host localhost:9944 was resolved.
* IPv6: ::1
* IPv4: 127.0.0.1
*   Trying [::1]:9944...
* Connected to localhost (::1) port 9944
> POST / HTTP/1.1
> Host: localhost:9944
> User-Agent: curl/8.5.0
> Accept: */*
> Content-Type: application/json
> Content-Length: 50
>
< HTTP/1.1 403 Forbidden
< content-type: text/plain
< content-length: 41
< date: Tue, 12 Nov 2024 13:03:49 GMT
<
Provided Host header is not whitelisted.
* Connection #0 to host localhost left intact

Behavior after this PR

$ polkadot --chain westend-dev &
➜ wasm-tests (update-artifacts-1731284930) ✗ curl -v \
     -H 'Content-Type: application/json' \
     -d '{"jsonrpc":"2.0","id":"id","method":"system_name"}' \
     http://localhost:9944
* Host localhost:9944 was resolved.
* IPv6: ::1
* IPv4: 127.0.0.1
*   Trying [::1]:9944...
* Connected to localhost (::1) port 9944
> POST / HTTP/1.1
> Host: localhost:9944
> User-Agent: curl/8.5.0
> Accept: */*
> Content-Type: application/json
> Content-Length: 50
>
< HTTP/1.1 200 OK
< content-type: application/json; charset=utf-8
< vary: origin, access-control-request-method, access-control-request-headers
< content-length: 54
< date: Tue, 12 Nov 2024 13:02:57 GMT
<
* Connection #0 to host localhost left intact
{"jsonrpc":"2.0","id":"id","result":"Parity Polkadot"}%

[niklasad1]

/cmd prdoc --audience node_operator --bump minor

[niklasad1]

bot fmt

[command-bot]

@niklasad1 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/7745714 was started for your command "$PIPELINE_SCRIPTS_DIR/commands/fmt/fmt.sh". Check out https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/pipelines?page=1&scope=all&username=group_605_bot to know what else is being executed currently.

Comment bot cancel 5-1705e9ab-3c7b-4a26-8821-c6a0ccdbc3ae to cancel this command or bot cancel to cancel all commands in this pull request.

[command-bot]

@niklasad1 Command "$PIPELINE_SCRIPTS_DIR/commands/fmt/fmt.sh" has finished. Result: https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/7745714 has finished. If any artifacts were generated, you can download them from https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/7745714/artifacts/download.

[paritytech-cmd-bot-polkadot-sdk]

Created backport PR for stable2407:

• [stable2407] Backport #6454 #6457 with remaining conflicts!

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-6454-to-stable2407
git worktree add --checkout .worktree/backport-6454-to-stable2407 backport-6454-to-stable2407
cd .worktree/backport-6454-to-stable2407
git reset --hard HEAD^
git cherry-pick -x 0a0af0ecde8b0152e408f3a9340e7daab56626fb
git push --force-with-lease

[paritytech-cmd-bot-polkadot-sdk]

Successfully created backport PR for stable2409:

• [stable2409] Backport #6454 #6458