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

[Conrad J. Sabatier]

There's a broken link in the upgrading-ports section of the porters'
handbook, which points to articles/problem-reports/pr-writing.html, a
non-existent file.

This should point to articles/problem-reports/article.html instead.

I tried submitting a patch (cvs diff) via send-pr, but ran into problems
with the character encoding for certain languages getting mangled in
the process.

Any advice on how to deal with this in the future?

-- 
Conrad J. Sabatier
conrads at cox.net