Bug 960064 Redirect Firefox VPAT pages to archive

Redirecting:

http://www.mozilla.com/en-US/firefox/vpat-1.5.html
http://www.mozilla.com/en-US/firefox/vpat-2.html
http://www.mozilla.com/en-US/firefox/vpat-3.html
to:
http://website-archive.mozilla.org/www.mozilla.org/firefox_vpat/firefox-vpat-1.5.html
http://website-archive.mozilla.org/www.mozilla.org/firefox_vpat/firefox-vpat-2.html
http://website-archive.mozilla.org/www.mozilla.org/firefox_vpat/firefox-vpat-3.html

Also redirect /en-US/firefox/vpat.html to the v3 version so we can drop that [old redirect from the SVN .htaccess file](http://viewvc.svn.mozilla.org/vc/projects/mozilla.com/trunk/.htaccess?view=markup#l200).