constant TYPO3_copyright_year should use the current year
The copyright year is currently hardcoded like 1998-2008.
IMO it would be better to just use the current year because now it is 2009 and I still see the 2008 in it.
The constant is used e.g at the first page in the Backend at the top. It is also one line less to thing of when the year changes.
(issue imported from #M10305)