code: public ServerBuilder tls(File keyCertChainFile, File keyFile) throws SSLException {
          defaultVirtualHostBuilderUpdated();
          defaultVirtualHostBuilder.tls(keyCertChainFile, keyFile);
          return this;
      }
docs: Configures SSL or TLS of the default {@link VirtualHost} from the specified {@code keyCertChainFile}
  and cleartext {@code keyFile}.
  
  @throws IllegalStateException if the default {@link VirtualHost} has been set via
  {@link #defaultVirtualHost(VirtualHost)} already