patch plugin documentation to refer to directive pages

[ikiwiki] / doc / plugins / more.mdwn

[[!template id=plugin name=more author="Ben"]]
[[!tag type/format]]

This plugin implements the [[ikiwiki/directive/more]] [[ikiwiki/directive]].
The directive provides a way to have a "more" link on a page in a blog, that
leads to the full version of the page.