Commits on Oct 25, 2023

1. Vert.x: fix NPE in ForwardedProxyHandler …

   The test `TrustedXForwarderProxiesUnknownHostnameFailureTest` sometimes fail
   in CI due to a NPE in `ForwardedProxyHandler`. This shows an actual bug:
   per the documentation, `io.vertx.core.dns.DnsClient.lookup()` may succeed
   with a `null` value when no record was found. The `ForwardedProxyHandler`
   ignores the possibility of a `null` result, which this commit fixes. We deal
   with a `null` result just like with a failure, because it's equivalent
   to a NXDOMAIN error.

   

   Ladicek committed Oct 25, 2023
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