The `IkiWiki::pagetitle` function does not respect title changes via `meta.title`. It really should, so that links rendered with `htmllink` get the proper title in the link text.

--[[madduck]]

> Agreed. [[todo/using_meta_titles_for_parentlinks]] contains a beginning of
> solution. A few quick notes about it:

> - Using <code>inline</code> would avoid the redefinition + code duplication.
> - A few plugins would need to be upgraded.
> - It may be necessary to adapt the testsuite in `t/pagetitle.t`, as well.
>
> --[[intrigeri]]
>
>> It was actually more complicated than expected. A working prototype is
>> now in my `meta` branch, see my userpage for the up-to-date url.
>> Thus tagging [[patch]]. --[[intrigeri]]
>>
>>> Joey, please consider merging my `meta` branch. --[[intrigeri]]