Broken link to articles/problem-reports/pr-writing.html in porters-handbook

[Mark Linimon]

On Wed, Aug 17, 2011 at 11:50:11AM +0200, Johann Kois wrote:
> For example if you build the local handbook you will get no
> book.html. If you build a local article you will get only
> article.html, but no "split-html".

I usually test by e.g. 'make book.html' instead of just 'make'.  I find
it easier to search for things on the single output.  Either way works.

mcl