Better hiearchy with Samples nav

Author: rwinch

spring-session-docs/modules/ROOT/nav.adoc

@@ -1,12 +1,18 @@
 * xref:whats-new.adoc[What's New]
 * xref:samples.adoc[Samples & Guides (Start Here)]
 ** Boot Samples
-*** xref:guides/boot-redis.adoc[HttpSession with Redis]
-*** xref:guides/boot-jdbc.adoc[HttpSession with JDBC]
-*** {gh-samples-url}spring-session-sample-boot-hazelcast[HttpSession with Hazelcast]
+*** HttpSession
+**** Redis
+***** {gh-samples-url}spring-session-sample-boot-redis-json[JSON serialization]
+***** {gh-samples-url}spring-session-sample-boot-redis-simple[Simple Redis]
+***** xref:guides/boot-redis.adoc[Redis with Events]
+**** xref:guides/boot-jdbc.adoc[JDBC]
+**** {gh-samples-url}spring-session-sample-boot-hazelcast[HttpSession with Hazelcast]
 *** xref:guides/boot-findbyusername.adoc[Find by Username]
 *** xref:guides/boot-websocket.adoc[WebSockets]
-*** {gh-samples-url}spring-session-sample-boot-webflux[WebFlux]
+** WebFlux
+*** {gh-samples-url}spring-session-sample-boot-webflux[Redis]
+*** xref:guides/boot-webflux-custom-cookie.adoc[Custom Cookie]
 ** Java Configuration
 ** XML Configuration
 * xref:modules.adoc[Modules]