The current menu system works great, but is too much work if all you want is a simple menu with the sections as menu items, and having these menu items connected to the pages in a way that enables setting the correct menu item as active for both the section lists and the pages itself.
This commit adds a new option `SectionPagesMenu' which, if set, will create a new menu with that name with all the sections as menu items. The pages in the sections will behave as "shadow members" of these section items as `blogpage.HasMenuCurrent "sectionmenu" $sectionmenuitem` will return true.
If a menu item with the same `identifier` is defined in site config, *that* item will take precedence.
Bind by default to 127.0.0.1. Previously it always bound to all interfaces.
Always have log message display that the server is available on the
interface to which it is bound, instead of the baseUrl.
Fixes#1097
Speed is about the same as before, uses slightly less memory:
```
benchmark old ns/op new ns/op delta
BenchmarkAbsURL 17302 17713 +2.38%
BenchmarkXMLAbsURL 9463 9470 +0.07%
benchmark old allocs new allocs delta
BenchmarkAbsURL 28 24 -14.29%
BenchmarkXMLAbsURL 14 12 -14.29%
benchmark old bytes new bytes delta
BenchmarkAbsURL 3422 3144 -8.12%
BenchmarkXMLAbsURL 1985 1864 -6.10%
```
Fixes#1059
Related to @bjornerik 's answer in this discussion: http://discuss.gohugo.io/t/inserting-data-from-data-file-into-content-file-newbie-question/1002/3 ... I figured I'd make myself useful and add the reference to the index function, on the go template primer page.
Also, I moved the reference links to the bottom.
A general comment: as good as these docs are, the primer at this point makes some assumptions about audience knowledge, so some might find it lacking. Once I understand better, I might make some more clarifying edits.
A couple of edits to clarify that the layout/partials folder can contain arbitrarily-named subfolders, since I found the examples using ``{{ partial "post/tag/list" . }}`` confusing. Some folders are named specifically to work a certain way with hugo, but although the examples use key functional section and taxonomy names like post and tag, it does not matter what they are called. Hopefully this will help other newbs.
The previous implementation didn't easily support the use case "I want one base template for the single pages, another for the rest".
The new lookup order is:
1. <current-path>/<template-name>-baseof.ace, e.g. list-baseof.ace
2. <current-path>/baseof.ace
3. _default/<template-name>-baseof.ace, e.g. list-baseof.ace.
4. _default/baseof.ace
