Add example snippet to doc. Add author tag to javadoc.

Signed-off-by: Olga Maciaszek-Sharma <olga.maciaszek-sharma@broadcom.com>

docs/modules/ROOT/pages/spring-cloud-netflix.adoc

@@ -116,7 +116,20 @@ eureka:
       socket-timeout: 10000
 ----
 
-You can also customise the `RequestConfig` for the underlying Apache HttpClient 5 by creating a bean of type `EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer`.
+You can also customise the `RequestConfig` for the underlying Apache HttpClient 5 by creating a bean of type `EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer`:
+
+[source,java,indent=0]
+----
+@Configuration
+public class RestClientConfiguration {
+
+	@Bean
+	EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer requestConfigCustomizer() {
+		return builder -> builder.setProtocolUpgradeEnabled(false);
+	}
+
+}
+----
 
 === Status Page and Health Indicator
 

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/EurekaClientHttpRequestFactorySupplier.java

@@ -43,6 +43,7 @@ public interface EurekaClientHttpRequestFactorySupplier {
 	/**
 	 * Allows customising the {@link RequestConfig} of the underlying Apache HC5 instance.
 	 *
+	 * @author Olga Maciaszek-Sharma
 	 * @since 4.2.1
 	 */
 	@FunctionalInterface