Add docs for Section Menu for “the Lazy Blogger”

docs/content/extras/menus.md

@@ -12,6 +12,9 @@ weight: 60
 Hugo has a simple yet powerful menu system that permits content to be
 placed in menus with a good degree of control without a lot of work. 
 
+
+*TIP:* If all you want is a simple menu for your sections, see [Section Menu for "the Lazy Blogger"]({{< relref "#section-menu-for-the-lazy-blogger" >}}).
+
 Some of the features of Hugo Menus:
 
 * Place content in one or many menus
@@ -183,3 +186,42 @@ The following is an example:
         </div>
     </aside>
     <!--sidebar end-->
+
+
+## Section Menu for "the Lazy Blogger"
+
+To enable this menu, add this to your site config, i.e. `config.toml`:
+
+```
+SectionPagesMenu = "main"
+```
+
+The menu name can be anything, but take a note of what it is.
+
+This will create a menu with all the sections as menu items and all the sections' pages as "shadow-members". The _shadow_ implies that the pages isn't represented by a menu-item themselves, but this enables you to create a top-level menu like this:
+
+```
+  <nav class="sidebar-nav">
+        {{ $currentNode := . }}
+        {{ range .Site.Menus.main }}
+        <a class="sidebar-nav-item{{if or ($currentNode.IsMenuCurrent "main" .) ($currentNode.HasMenuCurrent "main" .) }} active{{end}}" href="{{.URL}}">{{ .Name }}</a>
+        {{ end }}
+    </nav>
+
+```
+
+In the above, the menu item is marked as active if on the current section's list page or on a page in that section.
+
+The above is all that's needed. But if you want custom menu items, e.g. changing weight or name, you can define them manually in the site config, i.e. `config.toml`: 
+
+```
+ [[menu.main]]
+        name = "This is the blog section"
+        weight = -110
+        identifier = "blog"
+        url = "/blog/"
+
+```
+
+**Note** that the `identifier` must match the section name.
+

docs/content/meta/release-notes.md

@@ -21,7 +21,7 @@ Work In Progress.
 * Show help information to Windows users who try to double click on `hugo.exe`.
 * Add experimental support for [`Mmark`](https://github.com/miekg/mmark) markdown processor 
 * Add `AsciiDoc` support using external helpers.
-* Add section menu support for _the lazy blogger_
+* Add section menu support for a [Section Menu for "the Lazy Blogger"]({{< relref "extras/menus.md#section-menu-for-the-lazy-blogger" >}})
 * Add shortcode support for HTML files
 * Allow the same `shortcode` to  be used with or without inline content
 * Some important bugfixes: