Adds spring_cloud_gateway_mvc_diagram.png to how-it-works.adoc

Fixes gh-3173

docs/modules/ROOT/pages/spring-cloud-gateway-server-mvc/how-it-works.adoc

@@ -4,8 +4,7 @@
 
 The following diagram provides a high-level overview of how Spring Cloud Gateway works:
 
-// TODO: gateway mvc diagram
-//image::spring_cloud_gateway_diagram.png[Spring Cloud Gateway Diagram]
+image::spring_cloud_gateway_mvc_diagram.png[Spring Cloud Gateway Server MVC Diagram]
 
 In Spring Cloud Gateway Server MVC routes are normal WebMvc.fn `RouterFunction` instances with a special https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/function/HandlerFunction.html[HandlerFunction] to forward the requests over HTTP defined in https://github.com/spring-cloud/spring-cloud-gateway/blob/main/spring-cloud-gateway-server-mvc/src/main/java/org/springframework/cloud/gateway/server/mvc/handler/HandlerFunctions.java[org.springframework.cloud.gateway.server.mvc.handler.HandlerFunctions]. Please see the https://docs.spring.io/spring-framework/reference/web/webmvc-functional.html[WebMvc.fn] documentation for regular use of the functional API.
 

docs/modules/ROOT/partials/_configprops.adoc

@@ -123,6 +123,7 @@
 |spring.cloud.gateway.predicate.cookie.enabled | `+++true+++` | Enables the cookie predicate.
 |spring.cloud.gateway.predicate.header.enabled | `+++true+++` | Enables the header predicate.
 |spring.cloud.gateway.predicate.host.enabled | `+++true+++` | Enables the host predicate.
+|spring.cloud.gateway.predicate.host.include-port | `+++true+++` | Include the port in matching the host name.
 |spring.cloud.gateway.predicate.method.enabled | `+++true+++` | Enables the method predicate.
 |spring.cloud.gateway.predicate.path.enabled | `+++true+++` | Enables the path predicate.
 |spring.cloud.gateway.predicate.query.enabled | `+++true+++` | Enables the query predicate.