Alter host allow logic in rest api

it appears that at least in currently documented behaviour that we were filtering on server address not client address, which made it hard to reason about.

fixes Consensys#8567

Signed-off-by: Paul Harris <paul.harris@consensys.net>

CHANGELOG.md

@@ -14,3 +14,4 @@
 - Implemented [PostAggregateAndProofsV2](https://ethereum.github.io/beacon-APIs/?urls.primaryName=dev#/Validator/publishAggregateAndProofsV2) (adding support for Electra)
 
 ### Bug Fixes
+ - Updated allow-hosts logic to fix an issue with filtering (#8567).

infrastructure/restapi/src/main/java/tech/pegasys/teku/infrastructure/restapi/HostAllowlistHandler.java

@@ -33,7 +33,7 @@ public HostAllowlistHandler(final List<String> hostAllowlist) {
 
  @Override
  public void handle(final Context ctx) throws Exception {
- String header = ctx.host();
+ String header = ctx.ip();
  if (!isHostAuthorized(hostAllowlist, header)) {
  LOG.debug("Host not authorized " + header);
  throw new ForbiddenResponse("Host not authorized");