Comment 37 for bug 183052

Here's the crown copyright patch.

One warning I thought about when I reviewed this work today: this patch is consistent with the flowchart in that it completely ignores the crown author if other authors are present. The alternative is to still treat pubyear + 50 as a minimum for the pdyear, even if there are non-Crown authors.

This special case only comes up when maxauthordeath (for non-Crown authors) is defined as less than pubyear, and the pubyear is at least 1999.

For example, the work could have authors Crown and David. If David's death date is 1980 and the work was published in 2000, pdyear would be 1980 + 50 in the current patch. The "alternative" method I posted would result in pdyear 2000 + 50.