[[plugins/search]] could provide [OpenSearch](http://www.opensearch.org/) metadata. Various software supports OpenSearch (see the Wikipedia article on [[wikipedia OpenSearch]]); in particular, browsers like Firefox and Iceweasel will automatically discover an OpenSearch search and offer it in the search box. More specifically, we want to follow the [OpenSearch Description Document standard](http://www.opensearch.org/Specifications/OpenSearch/1.1#OpenSearch_description_document), by having a `link` with `rel="search"` and `type="application/opensearchdescription+xml"` in the headers of HTML, RSS, and Atom pages. The `href` of that `link` should point to an OpenSearchDescription XML file with contents generated based on the information in `ikiwiki.setup`, and the `title` attribute of the `link` should contain the wiki title from `ikiwiki.setup`. --[[JoshTriplett]] [[wishlist]]