TFPHttpServer doesn't expose `Address` property

Summary

TFPHttpServer exposes properties inherited from TFPCustomHttpServer. This includes Port, but Address is missing.
see https://gitlab.com/freepascal.org/fpc/source/-/blob/main/packages/fcl-web/src/base/fphttpserver.pp#L457

To me it seems this was overlooked, unless it's intentional.

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