To enable linking to specific parts of long ikiwiki pages, like the git-annex man page, auto-generate named anchors for all sections, based e.g. on section names (`<a name="My_section">`).  Maybe also do this for list items.

> The [[plugins/toc]] plugin does this. Is that not sufficient? There is also [[todo/toc-with-human-readable-anchors]]. -- [[anarcat]]
