Fix HC5 docs. Fixes gh-887.

docs/src/main/asciidoc/spring-cloud-openfeign.adoc

@@ -140,7 +140,9 @@ If none of them is on the classpath, the default feign client is used.
 
 NOTE: `spring-cloud-starter-openfeign` supports `spring-cloud-starter-loadbalancer`. However, as is an optional dependency, you need to make sure it has been added to your project if you want to use it.
 
-The OkHttpClient and Apache HttpClient 5 Feign clients can be used by setting `spring.cloud.openfeign.okhttp.enabled` or `spring.cloud.openfeign.httpclient.hc5.enabled` to `true`, respectively, and having them on the classpath.
+To use OkHttpClient-backed Feign clients, make sure OKHttpClient is on your classpath and set `spring.cloud.openfeign.okhttp.enabled` to `true`.
+
+When it comes to the Apache HttpClient 5-backed Feign clients, it's enough to ensure HttpClient 5 is on the classpath, but you can still disable its use for Feign Clients by setting  `spring.cloud.openfeign.httpclient.hc5.enabled` to `false`.
 You can customize the HTTP client used by providing a bean of either `org.apache.hc.client5.http.impl.classic.CloseableHttpClient` when using Apache HC5.
 
 You can further customise http clients by setting values in the `spring.cloud.openfeign.httpclient.xxx` properties. The ones prefixed just with `httpclient` will work for all the clients, the ones prefixed with `httpclient.hc5` to Apache HttpClient 5 and the ones prefixed with `httpclient.okhttp` to OkHttpClient. You can find a full list of properties you can customise in the appendix.

spring-cloud-openfeign-core/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -36,7 +36,7 @@
 			"name": "spring.cloud.openfeign.httpclient.hc5.enabled",
 			"type": "java.lang.Boolean",
 			"description": "Enables the use of the Apache HTTP Client 5 by Feign.",
-			"defaultValue": "false"
+			"defaultValue": "true"
 		},
 		{
 			"name": "spring.cloud.openfeign.okhttp.enabled",